Got a new camera the other day and was excited to try it out! Apparently so excited I didn't think to change the picture settings, so sorry about the color being blown out - they'll definitely look better next time. Any requests are still welcome by the way!
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