OK, this is a crazy combination of stuff. Try it; you might like it! Even if none of these things are your style, please give it a listen anyway. I'll be mostly running my fingers over the keys on the keyboard and lightly tapping on them, not pressing all the way down. I love the way this keyboard sounds when you just gently caress the keys. Then we also have some inaudible whispering (PLEASE don't make me define "inaudible" again), and the occasional cricket. Oh, and a plane or two. I've asked them them nicely to fly over more quietly, but they have once again refused to cooperate.
To listen while using other apps, switch the player to Picture-in-Picture (PiP) during playback — it keeps playing in a small floating window (the screen stays on).
To listen with the screen fully off, in-browser playback stops by YouTube's design. Open the video in the YouTube app to keep listening where background playback is supported (e.g. with YouTube Premium).
Open in YouTube app