I am aware my eyes look weird. I tried white eyeliner and it just makes me look odd. :P I wish I actually had a live specimen for these head massages, would be more realistic. Also, the audio is backwards :( forgot to swap it. You can swap your headphones to help it.
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