I built a GUI frontend to the the classic command line utility yt-dlp to help my dad use it. yt-dlp downloads audio or video from youtube.com and other sites.  This app sits atop the command line tools, so it requires brew, yt-dlp, and ffmpeg.  luckily, it is easily done with a few commands and the GUI wrapper guides you though it.  These projects do all the real work.  Upgrades to the yt-dlp are also occasionally required to keep up with the cat & mouse game with the streaming providers.  I hope you find this useful, you can download it here.  let me know what you think.  product page.