Funny, every time I get an ad for YouTube Premium pop up at the bottom of my iOS client, the feature they tout is "videos keep playing in the background" which

Funny, every time I get an ad for YouTube Premium pop up at the bottom of my iOS client, the feature they tout is "videos keep playing in the background" which sounds like an anti-feature. I use "killing the YouTube App" as the most-convenient method of stopping YouTube videos because it's less work than dealing with the on-screen controls.