yt-dlp

Using [yt-dlp](https://github.com/yt-dlp/yt-dlp) (install with `brew install`)

yt-dlp --download-archive downloaded.txt --extract-audio --audio-format mp3 -o "%(title)s.%(ext)s" 'https://www.youtube.com/watch?v=yuoghR-5-Xs&list=PLSdoVPM5Wnne3Q2AxosemsThywhraJ0su'

to download a video without audio in the best available format:

yt-dlp -f bestvideo https://www.youtube.com/watch?v=-wpHszfnJns

from the yt-dlp manual:

bv, bestvideo: Select the best quality video-only format. Equivalent to best*[acodec=none]

see the "format selection" section for more

To download auto-generated subs from youtube, add --write-auto-subs

yt-dlp -f bv --write-auto-subs https://www.youtube.com/watch?v=d3_DjiLLDfo -o schad.webm

That will download the subs as a vtt file, which can be burned into the video with something like:

ffmpeg -i schad.webm -vf subtitles=schad.en.vtt schad-subs.webm

see ffmpeg for more info

To save the playlist number as the track info in the song, use --parse-metadata "playlist_index:%(track_number)s". Here's an example that downloads a Ty Segall album from a playlist, converts them all to mp3, and inserts the playlist index as the track number:

yt-dlp \
  --download-archive downloaded.txt \
  --extract-audio \
  --audio-format mp3 \
  -o '%(playlist_autonumber)s.%(title)s.%(ext)s' \
  --embed-metadata \
  --parse-metadata "playlist_index:%(track_number)s" \
  'https://www.youtube.com/watch?v=KSM-_rU8IDI&list=PLvsYXqtYjMYdP-rVAR4_KAY24LdAkTKEw'