Delta Chat YouTube Bot

A simple Delta Chat bot that downloads YouTube videos and audio via yt-dlp. Designed to stay within email delivery limits (30 MB) and ensure maximum compatibility across all platforms.

Features

• Multi-Service Support: Downloads from YouTube, Yandex Music, PeerTube, Rutube, Dzen, OK.ru, Coub, Pinterest, SoundCloud, Imgur, Facebook, Vimeo, VK, vkvideo.ru, Twitter, Reddit, Instagram, TikTok, Twitch, Bilibili and more via yt-dlp.
• Video Downloads (/yt): Downloads video in MP4 (H.264 + AAC) at 360p or 480p (automatically uses 360p for videos over 10 minutes to stay within size limits).
• Audio Downloads (/ytm): Extracts audio as high-quality Opus. Optimized to skip re-encoding for short clips to preserve original quality.
• Auto-Detection: Automatically detects links in chat and provides download options with video thumbnails and estimated file sizes.
• Fast Commands: Use /yt_VIDEOID or /ytm_VIDEOID (for YouTube) or /yt URL (generic) for quick downloads.
• Visual Progress: Uses message reactions to show status:
  • ⏳ : Downloading started.
  • ⌛ : Downloaded, sending to chat.
  • ☑️ : Sent successfully.
  • ❌ : Error occurred.
  • ℹ️ : Already sent recently (Anti-spam).
• Smart Limits & Security:
  • Maximum video duration: 30 minutes.
  • Maximum audio duration: 60 minutes.
  • Maximum file size: 30 MB (safe for email delivery after Base64 encoding).
  • Rate limiting: 1 request per minute (admin exempt).
  • Global download queue: Max 5 concurrent downloads.
  • Handler-specific debouncing: Prevents race conditions and duplicate sends.
  • Smart Caching: Files are kept for 24 hours (max 2 GB) using safe MD5 hashes for URLs.
  • Anti-Spam: Prevents sending the same video to the same chat more than once every 10 minutes.
  • Disk Monitoring: Blocks downloads if server disk space is below 10%; warns admin at 20%.

Commands

• /yt <url> - Download video from URL.
• /yt_<video_id> - Download video by ID.
• /ytm <url> - Download audio from URL.
• /ytm_<video_id> - Download audio by ID.
• /stats - View bot usage statistics.
• /help - Show help message.
• /initadmin - Claim bot ownership (first time setup).
• /donate - Support the project.

Deployment

Prerequisites

• Docker and Docker Compose
• A Delta Chat account for the bot

Setup

1. Clone this repository.

2. Build the container:

   docker compose build

3. Initialize the Delta Chat account:

   docker compose run --rm yt_bot python bot.py init bot-email@chatmail-example.com your_password

4. Start the bot:

   docker compose up -d

5. Check the logs to get the QR code or link to add the bot:

   docker compose logs -f

6. Add the bot in Delta Chat and send /initadmin to claim ownership.

Cookies (Age-Restricted & VEVO Content)

To download age-restricted or VEVO-locked videos, place a valid YouTube cookies.txt (Netscape format) in the data/ directory:

cp cookies.txt ~/deltachat_yt/data/

Export cookies using the "Get cookies.txt LOCALLY" browser extension. Use a dedicated Google account — not your primary one. The bot will detect and use the file automatically on every request.

Admin Management

You can also manage the administrator via the CLI:

docker compose exec yt_bot python set_admin.py --email your@email.com

Support

If you find this bot useful, consider supporting the developer:

• Ko-fi
• Tribute