I do the same with Firefox native bookmarks because they auto+sync across devices. But to find/organize I use the add-on Bookmark Search 2 Plus which is great.
I don’t think it’s against the TOS. Some people just want to listen to audio to save bandwidth. It’s not doing anything extreme — just hiding the video. It’s a chill, vibe-y coding project for a harmless site.
So I pushed an update with the latest devices and some improvements. Please give it a try and let me know what to improve. You can contact me on my X @yuki_eliot
Can't find the video about it anymore, but I remember watching a video where someone showed it using the devtools. I believe after having the tab inactive you should see only audio being received by the browser (using devtools)