>>544776462
If you aren't a turbo retard you can just use FFMPEG to convert the video into either .MP3 or .OGG (Vorbis) DO NOT USE OPUS that shit is like the WEBP of audio.
If you ARE a turbo retard you can use something like
https://github.com/StefanLobbenmeier/youtube-dl-gui/ to download the video twice and set it to mp4 + either of those options, the newest version of webm for retards also lets you direct convert to mp4 and do minor edits
https://github.com/argorar/WebMConverter