Just a little something to remind yourself that there are indeed other things in this life besides anxiety, stress, worry and fear. I would recommend using headphones and to listen while laying down or sitting comfortably. (ASMR is a little sensation of tingles and head buzzing some people experience when somebody is offering them some kind of personal attention) AD
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