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Download video and audio from YouTube and 1000+ sites using yt-dlp. No API keys needed.
Passed 22 of 22 test cases with the skill, and 18 of 22 without it.
and 2 more in the full report
4 fixed18 passed either way0 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
I need to download https://www.youtube.com/watch?v=multi123 along with English, Spanish, and French subtitles merged into MP4 container. What flag string specifies these three languages?
| Checked | Without skill | With skill |
|---|---|---|
| Includes subtitle language option --sub-langs "en,es,fr" | Passed | Passed |
| Includes subtitle writing option --write-subs | Missed | Passed |
The instructions your model reads when the skill loads.
Download video and audio from URLs using yt-dlp directly. No wrapper scripts needed.
brew install yt-dlp or pip install yt-dlpbrew install ffmpeg or apt install ffmpeg (required for merging video+audio streams)Update yt-dlp periodically to keep up with site changes: yt-dlp -U or pip install -U yt-dlp.
yt-dlp "URL" -o "%(title)s.%(ext)s" --merge-output-format mp4
# 720p
yt-dlp "URL" -f "bestvideo[height<=720]+bestaudio/best[height<=720]" --merge-output-format mp4
# 1080p
yt-dlp "URL" -f "bestvideo[height<=1080]+bestaudio/best[height<=1080]" --merge-output-format mp4
yt-dlp "URL" -x --audio-format mp3 --audio-quality 0
# Download video with English subtitles
yt-dlp "URL" --write-subs --sub-langs en --merge-output-format mp4
test cases passed, vs 18 / 22 without
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