youtube-transcript-summarizer

# YouTube Transcript Summarizer Extract transcripts from YouTube videos and generate AI-powered summaries. Supports any source language and can output summaries in your preferred language. ## Requirements ```bash pip install -r requirements.txt # or: pip install youtube-transcript-api anthropic ``` - **ANTHROPIC_API_KEY** env var required for AI summarization - **yt-dlp** (optional) for automatic video title fetching - Python 3.7+ Cost depends on transcript length and current Claude API pricing. ## Usage ```bash # Single video (default: English -> Korean) python youtube_transcript_summarizer.py "https://www.youtube.com/watch?v=VIDEO_ID" # Transcript only (no AI summary) python youtube_transcript_summarizer.py "VIDEO_URL" --no-summary # Japanese video with English summary python youtube_transcript_summarizer.py "VIDEO_URL" --source-lang ja --target-lang en # Auto-detect source language python youtube_transcript_summarizer.py "VIDEO_URL" --source-lang auto --target-lang fr # Batch processing python youtube_transcript_summarizer.py --batch "urls.txt" --output-dir "summaries" # Custom model and transcript limit python youtube_transcript_summarizer.py "VIDEO_URL" --model claude-sonnet-4-5-20250929 --max-transcript-chars 30000 ``` ## CLI Options | Option | Description | Default | |--------|-------------|---------| | `--title` | Custom video title | Auto-fetched via yt-dlp | | `--source-lang` | Source transcript language | `en` | | `--target-lang` | Output summary language | `ko` | | `--output-dir` | Output directory | `outputs/summaries` | | `--batch FILE` | Process multiple URLs from file | - | | `--timeline-interval` | Timeline interval (minutes) | `5` | | `--no-summary` | Skip AI summary | `false` | | `--api-key` | Claude API key | `ANTHROPIC_API_KEY` env | | `--model` | Claude model name | `claude-sonnet-4-5-20250929` | | `--max-transcript-chars` | Max chars sent to Claude | `15000` | ## Supported Languages `en`, `ko`, `ja`, `zh`, `es`, `fr`, `de`, `pt`, `ru`, `ar`, `hi`, `auto` ## Output Format Files are named `YYYY-MM-DD VideoTitle.md` with YAML frontmatter: ```yaml --- title: "Video Title" source: "https://www.youtube.com/watch?v=ID" created: YYYY-MM-DD HH:MM:SS tags: - youtube-transcript video_id: "ID" source_lang: "en" target_lang: "ko" --- ``` Sections: Summary, Key Points, Main Content, Timeline, Full Transcript. ## Claude Code Integration ``` Summarize this YouTube video: https://www.youtube.com/watch?v=VIDEO_ID ```