Suggestion to everyone else: learn the CLI. Then you can do things like me last night. My wife collected a list of classical music videos she wants to play to our kid, and all I did was:
youtube-dl -x --audio-format "mp3" --audio-quality 0 -o "%(title)s.%(ext)s" -a music.txt
to get the whole list turned into neat and nicely-named MP3s (like "Mozart - Eine Kleine Nachtmusik, K 525 Allegro.mp3"). Followed by: mp3splt -r *.mp3
to trim the silence from both ends.I do batch downloads like these rarely, roughly once a year (though I expect it to happen more frequently in the near future). Because of that, I had both of the above commands stored in my snippets.org file. It's something I strongly recommend: store off-used CLI calls in your notes/personal wiki. It beats reinventing the commands a year down the line, or even trying to remember what tools did you use for that off job.
To preempt comments saying CLI is too hard for regular people: no, it isn't; they can learn[0], especially if you make them interested by e.g. showing them how to do batch jobs. But for the sake of the resistant, maybe the author of this GUI will upgrade it with option for batch downloads and format selection.
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[0] - https://digitalsuperpowers.com/ is a nice book I read and can recommend. No affiliation, just curiosity, because the author is a regular HNer.