/download-video

name: download-video
description: Download videos from 1000+ websites (YouTube, Bilibili, Twitter/X, TikTok, Vimeo, Instagram, Twitch, etc.) using yt-dlp. Use this skill whenever a user shares a video URL, asks to save or download a video, wants to extract audio from an online video, needs a specific quality like 1080p or 4K, or mentions downloading a playlist. Also trigger on "下载视频", "保存视频", "提取音频", or any URL from a supported video platform.

Download Video

Download videos from YouTube, Bilibili, Twitter/X, TikTok, and 1000+ other sites using yt-dlp.

Step 1: Check prerequisites

which yt-dlp && yt-dlp --version
which ffmpeg

If yt-dlp is missing, install it:

# macOS
brew install yt-dlp ffmpeg

# Cross-platform
pip install yt-dlp

Step 2: Download

Use the bundled script — it wraps yt-dlp with sensible defaults and clear error messages.

python3 scripts/download.py "VIDEO_URL"

Default output: `~/Downloads/Videos/`

Common options

python3 scripts/download.py "URL" -f 1080            # Max 1080p
python3 scripts/download.py "URL" -a                  # Audio only (MP3)
python3 scripts/download.py "URL" -F                  # List formats
python3 scripts/download.py "URL" --subs              # With subtitles
python3 scripts/download.py "URL" -o ~/Desktop        # Custom output dir
python3 scripts/download.py "URL" --cookies chrome    # Use browser cookies

Direct yt-dlp commands

For cases the script doesn't cover, use yt-dlp directly:

# Download playlist
yt-dlp -P ~/Downloads/Videos "PLAYLIST_URL"

# Custom filename template
yt-dlp -o "%(uploader)s - %(title)s.%(ext)s" "VIDEO_URL"

# Download with subtitles in specific languages
yt-dlp --write-subs --sub-lang zh,en -P ~/Downloads/Videos "VIDEO_URL"

Troubleshooting

Most download failures fall into these categories:

| Symptom | Fix | |---------|-----| | "Sign in required" or age-restricted | Add `--cookies chrome` to use browser session | | Only low quality available | Update yt-dlp (`brew upgrade yt-dlp`), then try with `--cookies chrome` | | Slow downloads | Try `--concurrent-fragments 3` or `--downloader aria2c` | | Network errors (behind firewall) | Use `--proxy socks5://127.0.0.1:1080` or set `ALL_PROXY` env var |

For platform-specific details (YouTube PO tokens, Bilibili series, TikTok watermark removal, etc.), see [references/platform-tips.md](references/platform-tips.md).