Re-upload. Nothing has changed. YouTube is not very nice to us. For the people who upload our videos, say that they are the owners: If you have a ASMR channel, please don't upload OUR videos. Be creative, make your own, instead of stealing OURS. You will feel better.
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