More of my story I apologize for the coughing in the background. My son's sick. Also, we're getting into a part of the story that's hard for me to read without getting emotional. Sorry; it's unavoidable. Please overlook 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