>>760913can't say for sure if it'll work with the screen off (i use the ps3 version), but
movian.tv has an android version, and the yt plugin blocks ads as well.
that being said, you might try
bitchute.com through your browser. the music section is...special, in some ways, but depending on what you're into, you can probably find something you like. it doesn't pause when you lock your screen (so long as you change the setting in your phone/browser to allow it to keep playing.
There IS a random glitch sometimes where it reloads a page or crashes the browser randomly, but otherwise, it works pretty good. personally, i use it to listen to political content when i'm working, but like i said, there is a music section