NOTE: The "history" section talks about the Civil War and slavery. The history was provided by the Ancestry website, and I read it along with everything else. If that bothers you, please don't watch. I'm disabling comments on this because, from my experience on here, anything that deals with Southern US history elicits conflict and debate. I learned my lesson the one time I tried to read some sections on a book about Georgia history. Sorry, no comments on this one.
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