Why does my music stop playing when the display times out?

[AC Question]

Galaxy Note 4. Never happened on my first Note 4. Got this replacement and now I can't listen to my music. Android 5.1.1. Yes I did search the forums. No. Nobody has given an answer that works.

 

[AndroidHabit]

What are you listening to music with?

 

[sydneycooper1979]

If you are listening on YouTube, this will happen. They want you to subscribe to YouTube red to get that feature.