51554947a0
Video Schema Classes (9 files): - VideoPost, VideoComment: Social media video modeling - VideoTextContent: Base class for text content extraction - VideoTranscript, VideoSubtitle: Text with timing and formatting - VideoTimeSegment: Time code handling with ISO 8601 duration - VideoAnnotation: Base annotation with W3C Web Annotation alignment - VideoAnnotationTypes: Scene, Object, OCR detection annotations - VideoChapter, VideoChapterList: Navigation and chapter structure - VideoAudioAnnotation: Speaker diarization, music, sound events Enumerations (12 enums): - VideoDefinitionEnum, LiveBroadcastStatusEnum - TranscriptFormatEnum, SubtitleFormatEnum, SubtitlePositionEnum - AnnotationTypeEnum, AnnotationMotivationEnum - DetectionLevelEnum, SceneTypeEnum, TransitionTypeEnum, TextTypeEnum - ChapterSourceEnum, AudioEventTypeEnum, SoundEventTypeEnum, MusicTypeEnum Examples (904 lines, 10 comprehensive heritage-themed examples): - Rijksmuseum virtual tour chapters (5 chapters with heritage entity refs) - Operation Night Watch documentary chapters (5 chapters) - VideoAudioAnnotation: curator interview, exhibition promo, museum lecture All examples reference real heritage entities with Wikidata IDs: Q5598 (Rembrandt), Q41264 (Vermeer), Q219831 (The Night Watch)
763 lines
22 KiB
YAML
763 lines
22 KiB
YAML
# Video Post Class
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# Concrete subclass of SocialMediaPost for video content with platform-specific properties
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#
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# Part of Heritage Custodian Ontology v0.9.5
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#
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# STRUCTURE:
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# SocialMediaPost (parent)
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# └── VideoPost (this class)
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# - duration, definition, captions
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# - view/like/comment metrics
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# - YouTube-specific fields
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#
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# DATA SOURCE EXAMPLE:
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# From data/custodian/NL-GE-AAL-M-NOM-nationaal_onderduikmuseum.yaml:
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# youtube_enrichment:
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# videos:
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# - video_id: FbIoC-Owy-M
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# duration: PT10M59S
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# definition: hd
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# caption_available: false
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# view_count: 132
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# like_count: 2
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# comment_count: 0
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id: https://nde.nl/ontology/hc/class/VideoPost
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name: video_post_class
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title: Video Post Class
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imports:
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- linkml:types
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- ./SocialMediaPost
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- ./SocialMediaPostTypes
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- ../slots/language
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prefixes:
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linkml: https://w3id.org/linkml/
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hc: https://nde.nl/ontology/hc/
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schema: http://schema.org/
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dcterms: http://purl.org/dc/terms/
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prov: http://www.w3.org/ns/prov#
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crm: http://www.cidoc-crm.org/cidoc-crm/
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skos: http://www.w3.org/2004/02/skos/core#
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as: https://www.w3.org/ns/activitystreams#
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wikidata: http://www.wikidata.org/entity/
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default_prefix: hc
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classes:
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VideoPost:
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is_a: SocialMediaPost
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class_uri: as:Video
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abstract: false
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description: |
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Concrete class for video content with platform-specific properties.
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**DEFINITION**:
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VideoPost is a specialized SocialMediaPost for video content. It extends
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the base post class with video-specific slots for duration, resolution,
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captions, and engagement metrics.
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**EXTENDS**: SocialMediaPost
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This class adds:
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- Video technical properties (duration, definition, aspect ratio)
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- Caption and subtitle availability
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- Engagement metrics (views, likes, comments)
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- Platform-specific fields (YouTube category, live broadcast status)
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- Temporal markers (chapters, segments)
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**ONTOLOGY MAPPINGS**:
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| Property | Activity Streams | Schema.org |
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|----------|------------------|------------|
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| Class | as:Video | schema:VideoObject |
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| duration | as:duration | schema:duration |
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| definition | - | schema:videoQuality |
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| caption | - | schema:caption |
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| view_count | - | schema:interactionStatistic |
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**PLATFORM SUPPORT**:
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| Platform | Duration Limit | Resolution | Captions |
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|----------|----------------|------------|----------|
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| YouTube | 12 hours (verified) | Up to 8K | VTT, SRT |
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| Vimeo | Varies by plan | Up to 8K | VTT, SRT |
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| Facebook | 4 hours | Up to 4K | Auto-generated |
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| TikTok | 10 minutes | 1080p | Auto-generated |
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| Instagram Reels | 90 seconds | 1080p | Auto-generated |
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**HERITAGE INSTITUTION USE CASES**:
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| Content Type | Typical Duration | Platform |
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|--------------|------------------|----------|
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| Virtual tours | 10-30 min | YouTube |
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| Conservation docs | 5-20 min | YouTube, Vimeo |
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| Curator interviews | 15-60 min | YouTube |
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| Object spotlights | 2-5 min | YouTube, Instagram |
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| Short clips | 15-60 sec | TikTok, Reels |
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| Live recordings | 30-120 min | YouTube |
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**METRICS OBSERVATION**:
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Video metrics (views, likes, comments) are observational data that change
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constantly. Each metric reading should include:
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- `metrics_observed_at`: When metrics were recorded
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- `retrieval_timestamp`: When API call was made
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**RELATIONSHIP TO VideoPostType**:
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- VideoPost is a **concrete post instance** with video content
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- VideoPostType is a **type classification** for categorizing posts
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- A VideoPost typically has `post_types: [VideoPostType]`
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- But may also have multiple types: `[LiveStreamPostType, VideoPostType]`
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**CAPTION AND SUBTITLE DISTINCTION**:
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Related classes for textual content derived from video:
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- VideoSubtitle: Time-coded text (SRT/VTT format)
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- VideoTranscript: Full text without timestamps
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- VideoAnnotation: Computer vision derived content
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See VideoTextContent hierarchy for detailed modeling.
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exact_mappings:
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- as:Video
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- schema:VideoObject
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close_mappings:
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- crm:E73_Information_Object
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related_mappings:
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- wikidata:Q34508 # Video
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- wikidata:Q604644 # Online video
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slots:
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# ========================================
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# Video Technical Properties
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# ========================================
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- duration
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- definition
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- aspect_ratio
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- frame_rate
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# ========================================
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# Caption and Subtitle Availability
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# ========================================
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- caption_available
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- default_language
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- default_audio_language
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- available_caption_languages
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# ========================================
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# Engagement Metrics
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# ========================================
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- view_count
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- like_count
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- dislike_count
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- comment_count
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- favorite_count
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- metrics_observed_at
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# ========================================
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# Platform-Specific
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# ========================================
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- video_category_id
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- live_broadcast_content
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- is_licensed_content
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- is_embeddable
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- is_made_for_kids
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# ========================================
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# Comments/Replies
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# ========================================
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- comments_fetched
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- video_comments
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slot_usage:
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# --- Video Technical Properties ---
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duration:
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slot_uri: schema:duration
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description: |
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Duration of the video in ISO 8601 format.
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Schema.org: duration for media length.
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**Format**: ISO 8601 duration (e.g., "PT10M59S" = 10 minutes 59 seconds)
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**Common Patterns**:
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- PT30S = 30 seconds
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- PT5M = 5 minutes
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- PT1H30M = 1 hour 30 minutes
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- PT2H15M30S = 2 hours 15 minutes 30 seconds
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range: string
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required: false
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pattern: "^P(T(\\d+H)?(\\d+M)?(\\d+S)?)?$"
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examples:
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- value: "PT10M59S"
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description: "10 minutes and 59 seconds"
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- value: "PT1H30M"
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description: "1 hour 30 minutes"
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definition:
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slot_uri: schema:videoQuality
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description: |
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Video resolution/definition quality.
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Schema.org: videoQuality for resolution class.
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**Values**:
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- sd: Standard definition (480p or lower)
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- hd: High definition (720p, 1080p)
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- 4k: Ultra HD (2160p)
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- 8k: Full Ultra HD (4320p)
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range: VideoDefinitionEnum
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required: false
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examples:
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- value: "hd"
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description: "High definition (720p/1080p)"
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aspect_ratio:
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slot_uri: schema:width
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description: |
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Video aspect ratio.
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**Common Values**:
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- 16:9: Standard widescreen (YouTube default)
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- 9:16: Vertical (Shorts, Reels, TikTok)
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- 4:3: Classic TV format
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- 1:1: Square (Instagram legacy)
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- 21:9: Cinematic ultrawide
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range: string
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required: false
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examples:
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- value: "16:9"
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description: "Standard widescreen"
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- value: "9:16"
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description: "Vertical format for Shorts/Reels"
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frame_rate:
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slot_uri: hc:frameRate
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description: |
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Video frame rate in frames per second.
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**Common Values**:
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- 24: Cinema standard
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- 25: PAL standard
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- 30: NTSC standard
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- 60: High frame rate
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range: float
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required: false
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examples:
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- value: 30.0
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description: "30 frames per second"
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# --- Caption and Subtitle Availability ---
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caption_available:
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slot_uri: schema:hasPart
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description: |
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Whether captions/subtitles are available for this video.
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Indicates if the video has any caption tracks (auto-generated or manual).
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Related: Use `available_caption_languages` for specific languages.
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range: boolean
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required: false
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examples:
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- value: true
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description: "Video has captions available"
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- value: false
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description: "No captions available"
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default_language:
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slot_uri: schema:inLanguage
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description: |
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Default/primary language of the video content.
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Schema.org: inLanguage for content language.
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ISO 639-1 code (e.g., "nl", "en", "de").
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Refers to on-screen text, title, description language.
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range: string
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required: false
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examples:
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- value: "nl"
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description: "Dutch language content"
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default_audio_language:
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slot_uri: hc:defaultAudioLanguage
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description: |
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Language of the video's default audio track.
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ISO 639-1 code. May differ from `default_language` for
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dubbed or multilingual content.
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range: string
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required: false
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examples:
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- value: "nl"
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description: "Dutch audio track"
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available_caption_languages:
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slot_uri: hc:availableCaptionLanguages
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description: |
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List of languages for which captions are available.
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ISO 639-1 codes for all caption tracks.
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range: string
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multivalued: true
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required: false
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examples:
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- value: ["nl", "en", "de"]
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description: "Captions available in Dutch, English, German"
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# --- Engagement Metrics ---
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view_count:
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slot_uri: schema:interactionCount
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description: |
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Number of views for this video.
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Schema.org: interactionCount for view statistic.
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**OBSERVATIONAL**: This value changes constantly.
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Always record `metrics_observed_at` timestamp.
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range: integer
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required: false
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minimum_value: 0
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examples:
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- value: 132
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description: "132 views at observation time"
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like_count:
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slot_uri: hc:likeCount
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description: |
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Number of likes/upvotes for this video.
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Platform-specific: YouTube likes, Facebook reactions, etc.
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**OBSERVATIONAL**: Record with `metrics_observed_at`.
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range: integer
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required: false
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minimum_value: 0
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examples:
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- value: 2
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description: "2 likes at observation time"
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dislike_count:
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slot_uri: hc:dislikeCount
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description: |
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Number of dislikes/downvotes (if available).
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Note: YouTube hid public dislike counts in Nov 2021.
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API may still return dislike data for channel owners.
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range: integer
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required: false
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minimum_value: 0
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comment_count:
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slot_uri: hc:commentCount
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description: |
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Number of comments on this video.
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**OBSERVATIONAL**: Record with `metrics_observed_at`.
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range: integer
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required: false
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minimum_value: 0
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examples:
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- value: 0
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description: "No comments at observation time"
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favorite_count:
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slot_uri: hc:favoriteCount
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description: |
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Number of times video was favorited/saved.
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Platform-specific availability.
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range: integer
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required: false
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minimum_value: 0
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metrics_observed_at:
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slot_uri: prov:atTime
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description: |
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Timestamp when engagement metrics were recorded.
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PROV-O: atTime for observation timestamp.
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**CRITICAL**: Metrics change constantly. This timestamp
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indicates when view_count, like_count, etc. were observed.
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range: datetime
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required: false
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examples:
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- value: "2025-12-01T23:16:22.294232+00:00"
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description: "Metrics observed December 1, 2025"
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# --- Platform-Specific ---
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video_category_id:
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slot_uri: hc:videoCategoryId
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description: |
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Platform-specific category identifier.
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**YouTube Category IDs**:
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- 1: Film & Animation
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- 2: Autos & Vehicles
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- 10: Music
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- 15: Pets & Animals
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- 17: Sports
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- 19: Travel & Events
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- 20: Gaming
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- 22: People & Blogs
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- 23: Comedy
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- 24: Entertainment
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- 25: News & Politics
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- 26: Howto & Style
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- 27: Education
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- 28: Science & Technology
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- 29: Nonprofits & Activism
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range: string
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required: false
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examples:
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- value: "22"
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description: "YouTube: People & Blogs"
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- value: "27"
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description: "YouTube: Education"
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live_broadcast_content:
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slot_uri: hc:liveBroadcastContent
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description: |
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Live broadcast status of the video.
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**Values**:
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- none: Not a live broadcast (standard video)
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- live: Currently broadcasting live
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- upcoming: Scheduled live stream not yet started
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When `live` or `upcoming` becomes `none`, video is archived.
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range: LiveBroadcastStatusEnum
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required: false
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examples:
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- value: "none"
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description: "Standard video (not live)"
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- value: "live"
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description: "Currently broadcasting"
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is_licensed_content:
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slot_uri: hc:isLicensedContent
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description: |
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Whether the video contains licensed content (music, clips).
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Affects monetization and regional availability.
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range: boolean
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required: false
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is_embeddable:
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slot_uri: hc:isEmbeddable
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description: |
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Whether the video can be embedded on external sites.
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Publisher-controlled setting.
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range: boolean
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required: false
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is_made_for_kids:
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slot_uri: hc:isMadeForKids
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description: |
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Whether the video is designated as made for children.
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COPPA compliance flag. Affects comments, ads, features.
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range: boolean
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required: false
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# --- Comments ---
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comments_fetched:
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slot_uri: hc:commentsFetched
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description: |
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Number of comments actually fetched/archived.
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May be less than `comment_count` due to API limits,
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deleted comments, or pagination.
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range: integer
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required: false
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minimum_value: 0
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examples:
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- value: 0
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description: "No comments fetched"
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video_comments:
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slot_uri: hc:videoComments
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description: |
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Collection of comments on this video.
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Structured comment data with author, text, timestamp, likes.
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Note: Comments may contain nested replies.
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range: VideoComment
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multivalued: true
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required: false
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inlined: true
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comments:
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- "Extends SocialMediaPost with video-specific properties"
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- "Maps to as:Video and schema:VideoObject"
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- "Metrics are observational - always include metrics_observed_at"
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- "Caption availability signals but not content (see VideoSubtitle)"
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- "YouTube is primary platform for heritage institution video content"
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see_also:
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- "https://www.w3.org/ns/activitystreams#Video"
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- "https://schema.org/VideoObject"
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- "https://developers.google.com/youtube/v3/docs/videos"
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# ==========================================================================
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# Supporting Class: VideoComment
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# ==========================================================================
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VideoComment:
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class_uri: schema:Comment
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description: |
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A comment on a video post.
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Models user-generated comments with author, text, timestamp,
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and engagement metrics. Supports nested reply threads.
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exact_mappings:
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- schema:Comment
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- as:Note
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slots:
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- comment_id
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- comment_author
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- comment_author_channel_id
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- comment_text
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- comment_published_at
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- comment_updated_at
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- comment_like_count
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- comment_reply_count
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- comment_replies
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slot_usage:
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comment_id:
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slot_uri: dcterms:identifier
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description: Unique identifier for the comment
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range: string
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required: true
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comment_author:
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slot_uri: schema:author
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description: Display name of comment author
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range: string
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required: true
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comment_author_channel_id:
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slot_uri: hc:authorChannelId
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description: Platform channel/account ID of author
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range: string
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required: false
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comment_text:
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slot_uri: schema:text
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description: Full text content of the comment
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range: string
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required: true
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comment_published_at:
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slot_uri: dcterms:created
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description: When comment was originally posted
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range: datetime
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required: true
|
|
|
|
comment_updated_at:
|
|
slot_uri: dcterms:modified
|
|
description: When comment was last edited
|
|
range: datetime
|
|
required: false
|
|
|
|
comment_like_count:
|
|
slot_uri: hc:likeCount
|
|
description: Number of likes on this comment
|
|
range: integer
|
|
required: false
|
|
minimum_value: 0
|
|
|
|
comment_reply_count:
|
|
slot_uri: hc:replyCount
|
|
description: Number of replies to this comment
|
|
range: integer
|
|
required: false
|
|
minimum_value: 0
|
|
|
|
comment_replies:
|
|
slot_uri: schema:comment
|
|
description: Nested reply comments
|
|
range: VideoComment
|
|
multivalued: true
|
|
required: false
|
|
inlined: true
|
|
|
|
# ============================================================================
|
|
# Supporting Enumerations
|
|
# ============================================================================
|
|
|
|
enums:
|
|
|
|
VideoDefinitionEnum:
|
|
description: |
|
|
Video resolution/definition quality categories.
|
|
|
|
Based on common platform standards.
|
|
permissible_values:
|
|
sd:
|
|
description: Standard definition (480p or lower)
|
|
hd:
|
|
description: High definition (720p, 1080p)
|
|
uhd:
|
|
description: Ultra HD (2160p/4K)
|
|
4k:
|
|
description: 4K resolution (2160p) - alias for uhd
|
|
8k:
|
|
description: Full Ultra HD (4320p)
|
|
|
|
LiveBroadcastStatusEnum:
|
|
description: |
|
|
Live broadcast status values for video content.
|
|
|
|
Based on YouTube API liveBroadcastContent values.
|
|
permissible_values:
|
|
none:
|
|
description: Not a live broadcast (standard uploaded video)
|
|
live:
|
|
description: Currently broadcasting live
|
|
upcoming:
|
|
description: Scheduled live stream that hasn't started yet
|
|
|
|
# ============================================================================
|
|
# Slot Definitions
|
|
# ============================================================================
|
|
|
|
slots:
|
|
duration:
|
|
description: Duration in ISO 8601 format
|
|
range: string
|
|
|
|
definition:
|
|
description: Video resolution quality (sd, hd, 4k, 8k)
|
|
range: VideoDefinitionEnum
|
|
|
|
aspect_ratio:
|
|
description: Video aspect ratio (16:9, 9:16, 4:3, etc.)
|
|
range: string
|
|
|
|
frame_rate:
|
|
description: Frame rate in FPS
|
|
range: float
|
|
|
|
caption_available:
|
|
description: Whether captions are available
|
|
range: boolean
|
|
|
|
default_audio_language:
|
|
description: Language of default audio track
|
|
range: string
|
|
|
|
available_caption_languages:
|
|
description: Languages for which captions exist
|
|
range: string
|
|
multivalued: true
|
|
|
|
view_count:
|
|
description: Number of views
|
|
range: integer
|
|
|
|
like_count:
|
|
description: Number of likes
|
|
range: integer
|
|
|
|
dislike_count:
|
|
description: Number of dislikes
|
|
range: integer
|
|
|
|
comment_count:
|
|
description: Number of comments
|
|
range: integer
|
|
|
|
favorite_count:
|
|
description: Number of favorites/saves
|
|
range: integer
|
|
|
|
metrics_observed_at:
|
|
description: When metrics were recorded
|
|
range: datetime
|
|
|
|
video_category_id:
|
|
description: Platform category identifier
|
|
range: string
|
|
|
|
live_broadcast_content:
|
|
description: Live broadcast status
|
|
range: LiveBroadcastStatusEnum
|
|
|
|
is_licensed_content:
|
|
description: Contains licensed content
|
|
range: boolean
|
|
|
|
is_embeddable:
|
|
description: Can be embedded externally
|
|
range: boolean
|
|
|
|
is_made_for_kids:
|
|
description: COPPA kids content flag
|
|
range: boolean
|
|
|
|
comments_fetched:
|
|
description: Number of comments actually retrieved
|
|
range: integer
|
|
|
|
video_comments:
|
|
description: Collection of video comments
|
|
range: VideoComment
|
|
multivalued: true
|
|
|
|
# VideoComment slots
|
|
comment_id:
|
|
description: Unique comment identifier
|
|
range: string
|
|
|
|
comment_author:
|
|
description: Comment author display name
|
|
range: string
|
|
|
|
comment_author_channel_id:
|
|
description: Author's channel/account ID
|
|
range: string
|
|
|
|
comment_text:
|
|
description: Comment text content
|
|
range: string
|
|
|
|
comment_published_at:
|
|
description: When comment was posted
|
|
range: datetime
|
|
|
|
comment_updated_at:
|
|
description: When comment was edited
|
|
range: datetime
|
|
|
|
comment_like_count:
|
|
description: Likes on this comment
|
|
range: integer
|
|
|
|
comment_reply_count:
|
|
description: Number of replies
|
|
range: integer
|
|
|
|
comment_replies:
|
|
description: Nested reply comments
|
|
range: VideoComment
|
|
multivalued: true
|