For those that saw this live, sorry about the audio hiccup. I'm gonna make a checklist and duct tape it to my laptop so that doesn't happen again lol Hopefully to make up for it here's the HD audio synced to the live video.
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