If the sound is too quiet.. please use headphones. I also apologise for the lack of visual quality. Anyway this is more of a "watch and tingle" asmr rather than a listening one. As asmr is not only from listening but watching people concentrate and perform certain tasks. In this video I test the pH level of my fish tank (that has no fish yet) as I am doing a fishless cycle.
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