From my initial test, I can't confirm background playback (if activated it still stops a second after screen lock).
Another requirement: remember playback position in videos when resuming.
Somehow, I got issues with getting back to the video (even without remembering playback position). I only get the sound, the image preview and the playlist but not the video. Then, the sound continues even in lock screen mode but I never get back to the video after unlock. 🤔