This page features the playlists I am creating from the posted music. They are meant for listening. I am mostly adding original recordings to the playlists, so the sound should be good (for YouTube). If you want to listen to YouTube in the background on Android and iOS, check out the article by Eric Ravenscraft (excerpt see below). It will tell you what apps to download.
Take Your Music with You on Android and iOS
No music service is complete without a mobile component. Unfortunately, the official YouTube app doesn’t let you listen to videos in the background (yet). While offline playback isn’t legally possible yet, there are still plenty of services that will let you load just the audio in the background.