yt-dlp-playlist.sh

#!/usr/bin/env sh

# Downloads the audio of all videos of the given playlist,
# saves as mp3 /with metadata and square(!) thumbnail.
# Note: yt-dlp and ffmpeg are required.
# Use: ./yt-dlp-playlist.sh YT_PLAYLIST_ID

./yt-dlp --extract-audio --audio-format mp3 --audio-quality 0 \
    --add-metadata --embed-thumbnail --convert-thumbnails jpg \
    --ppa 'EmbedThumbnail+ffmpeg_o:-c:v mjpeg -vf crop="'"'"'if(gt(ih,iw),iw,ih)'"':'"'if(gt(iw,ih),ih,iw)'"'"'"' \
    -o "./%(playlist_index)s - %(title)s.%(ext)s" \
    https://www.youtube.com/playlist?list=$1