Ryan Chen 2305dfddb1 Add async video downloads with yt-dlp and Celery ...

- Added yt-dlp, celery, and redis dependencies to pyproject.toml
- Extended VideoEntry model with download tracking fields:
  - download_status (enum: pending, downloading, completed, failed)
  - download_path, download_started_at, download_completed_at
  - download_error, file_size
- Created celery_app.py with Redis broker configuration
- Created download_service.py with async download tasks:
  - download_video() task downloads as MP4 format
  - Configured yt-dlp for best MP4 quality with fallback
  - Automatic retries on failure (max 3 attempts)
  - Progress tracking and database updates
- Added Flask API endpoints in main.py:
  - POST /api/download/<video_id> to trigger download
  - GET /api/download/status/<video_id> to check status
  - POST /api/download/batch for bulk downloads
- Generated and applied Alembic migration for new fields
- Created downloads/ directory for video storage
- Updated .gitignore to exclude downloads/ directory
- Updated CLAUDE.md with comprehensive documentation:
  - Redis and Celery setup instructions
  - Download workflow and architecture
  - yt-dlp configuration details
  - New API endpoint examples

Videos are downloaded as MP4 files using Celery workers.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-26 14:04:30 -05:00

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