I don't recall, but literally the things mentioned above is all you need. Toggle background on, done
Discussion
Looks like I already had it on. You’re trying to listen to music on YouTube through brave like it’s a Spotify app?
Yes, most of the time that's how I end up there. A lot of music isn't on the streaming apps once you go a bit niche.
In this particular case I wanted to have a podcast I got a link to play. Sure I could prob find it outside YouTube, but that's work.