# CleoSum - AI-Powered YouTube Video Analysis

> CleoSum is a Chrome extension that adds AI-powered analysis overlays directly on YouTube video thumbnails. Get instant summaries, comment analysis, usefulness scores, and full transcripts without watching the video.

## What CleoSum Does

CleoSum helps users save time by providing AI analysis of YouTube videos before they watch. Hover over any video thumbnail on YouTube to see:

- **AI Video Summaries**: Key takeaways, usefulness scores (1-10), info density, clickbait detection, and sentiment analysis
- **Comment Analysis**: What viewers think — top takes, common complaints, sentiment breakdown
- **Full Transcripts**: Searchable, timestamped video transcripts with copy functionality
- **Share Links**: Every analysis generates a shareable web page at cleosum.com/video/{id}

## How It Works

1. Install the CleoSum Chrome extension
2. Go to YouTube and hover over any video thumbnail
3. Click Summarize, Comments, or Transcript
4. Get instant AI-powered analysis in an overlay

## Pricing

- **Free**: 5 analyses total, no time limit, no credit card required
- **Pro** ($4.99/mo annual or $9.99/mo monthly): 50 analyses/day, all core features, unlimited videos
- **Pro+** ($9.99/mo annual or $14.99/mo monthly): everything in Pro, plus **Deep Analysis** mode (Sonnet 4.6), 100 quick + 10 deep analyses/day, and longer transcripts (40K chars)

## Links

- Website: https://cleosum.com
- Chrome Web Store: https://chromewebstore.google.com/detail/cleosum
- Video Analysis Pages: https://cleosum.com/video/{youtube-video-id}

## SEO Video Pages

CleoSum generates public analysis pages for every analyzed video at `https://cleosum.com/video/{videoId}`. These pages contain:
- AI-generated video summary with scores
- Comment sentiment analysis
- Available in multiple languages via the `?lang=xx` query parameter
  (ISO 639-1 code, e.g. `?lang=ru`, `?lang=uk`, `?lang=es`). The bare
  `/video/{videoId}` URL serves the English variant when available.
  Example: `https://cleosum.com/video/BU5VkvcQzOA?lang=ru`
  Each language variant is listed as an `<xhtml:link rel="alternate">`
  entry in the sitemap and as a `<link rel="alternate" hreflang="...">`
  tag in the page head so search engines and AI crawlers can discover
  and index every translation.
- Structured data (JSON-LD) for rich search results (Article, VideoObject,
  BreadcrumbList, FAQPage) with `inLanguage` set to the rendered variant

## Technical Details

- Chrome Extension (Manifest V3)
- Works on all YouTube pages (homepage, search, watch, shorts)
- Supports 20+ languages for analysis output
- Uses advanced AI models for quick and deep analysis modes

## Discovering Analyzed Videos

CleoSum publishes a sitemap listing every public video analysis page:

- Sitemap (all pages): https://cleosum.com/sitemap.xml
- Individual analyses live at: https://cleosum.com/video/{videoId}

## Example Analyses

A curated sample of public video analysis pages (full list in the sitemap):

- https://cleosum.com/video/BU5VkvcQzOA
- https://cleosum.com/video/DveX_WEkqqE
- https://cleosum.com/video/V3-a58Wt2tk
- https://cleosum.com/video/dQw4w9WgXcQ
- https://cleosum.com/video/9bZkp7q19f0
- https://cleosum.com/video/kJQP7kiw5Fk
- https://cleosum.com/video/fJ9rUzIMcZQ
- https://cleosum.com/video/hTWKbfoikeg

Each page contains the AI-generated summary, key takeaways, insights, and
comment analysis for that specific YouTube video, rendered as static HTML
with JSON-LD structured data (Article, VideoObject, BreadcrumbList, FAQPage).