In the last week, music-video music will stop playing in the background after about 4 minutes. For at least a year now, in Private Mode, I have been able to play music videos with the phone display off. I was able to hear the full songs. When the music video ended, there was a delay, then another related video would play, and I would listen to that music also. This all happened in the background with my display off, on my Android Galaxy Note 20 Ultra phone. (Google Play Store identifies my device as "Samsung SM-G950U) If I didn't want to hear the next song play, I would turn on the phone display with the power button and either tap "cancel" or "replay" the song that just ended. I find these music videos on the Firefox browser app. I use Private Mode to reduce future related ads. Almost all of the music is from "https://m.youtube.com/watch?" using the Firefox browser app. > Keeping the screen on uses a lot more battery power just to listen to video music. > I did find that if an ad plays before the music video starts, the music may play longer in the background before it quits.