simple-video-downloader

Video downloader skill powered by yt-dlp. Downloads videos from Bilibili, YouTube, Twitter, Twitch and 1700+ sites. Use when user wants to download videos, extract audio, or get video metadata from any supported platform.

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Install skill "simple-video-downloader" with this command: npx skills add echoziness/agent-skills/echoziness-agent-skills-simple-video-downloader

Simple Video Downloader

Built on yt-dlp - a powerful open-source video downloader.

Prerequisites

This skill requires yt-dlp to be installed. Before proceeding:

  1. Check if yt-dlp is available:

    yt-dlp --version

  2. If not installed, let the user decide how to handle it:

    • Install via: pip install yt-dlp or download binary from yt-dlp releases
    • If user has no Python, they may prefer alternative approaches (browser extensions, online services, etc.)

Do not install yt-dlp for the user. Let them choose their preferred method.

Workflow

  1. Get info: Run yt-dlp -j <URL> for metadata, yt-dlp -F <URL> for available formats
  2. Analyze: Check resolution, duration, chapters, subtitles/danmaku availability
  3. Ask user: Use question tool to confirm options
  4. Build command: Construct and execute the download command

Common Options

OptionPurpose
-f "bestvideo+bestaudio"Best quality video + audio merge
--write-subs --sub-lang danmakuDownload danmaku (Bilibili)
--write-thumbnail --embed-thumbnailDownload and embed cover
--embed-metadataEmbed video metadata
-x --audio-format mp3Extract audio as MP3
--cookies-from-browser chromeUse browser cookies for premium content

Output

Save to _Output/ directory:

-o "_Output/%(title)s [%(id)s].%(ext)s"

Tips

  • Chapters: Embedded in video by default. Do NOT use --split-chapters (creates messy leftover files)
  • Bilibili: 4K/1080P60 requires premium membership. Ask about danmaku preference
  • Verify: Use ffprobe to check downloaded file details

Reference

For detailed yt-dlp options, see: references/usage-guide.md

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