If you want to listen to music while the screen is off or in another app, then just use the browser version of YouTube. This app is just like the normal youtube app but only the songs, and if you want that, then just make a playlist of songs you like or use the recommended playlist that the YouTube app gives you, rather than pay a SUBSCRIPTION to listen outside of the app. If you ask me, the ads don't really bother me. I know they still need to make money.