Individual skill

youtube-seo-thumbnail

Advanced thumbnail CTR analysis using computer vision, face/emotion detection, CLIP-embedding SERP similarity, Gestalt composition rules, and YouTube native Test & Compare planning. Use when user says "thumbnail review", "improve CTR", "thumbnail design", or provides a thumbnail image/URL.

youtube-seo-thumbnail/SKILL.md

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Apr 9, 2026
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MIT

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# Thumbnail Analysis (Advanced)

Diagnose CTR potential quantitatively when possible, qualitatively when
not. Thumbnail is the single biggest pre-click lever after title.

## Data Collection

1. **Source thumbnail**: download the maxres (`maxresdefault.jpg`) from
   `https://i.ytimg.com/vi/{VIDEO_ID}/maxresdefault.jpg`, fall back to
   `hqdefault.jpg` if missing
2. **SERP grid**: fetch the top 12 YouTube results for the primary
   keyword, download each thumbnail, build a 4x3 contact sheet
3. **Computer-vision pass** via `scripts/analyze_thumbnail.py`:
   - OpenCV face detection (count, bbox, size %)
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