You must have been so sleepy when you got home today.... I wish I could have been there to fall asleep with you. But atleast I can hold you close and wish you the sweetest of dreams. Sounds from: Quicksound.com Freesound.org
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