Opus

You can find a good description of the app here: https://anonymusraccoon.github.io/RaccoonWebsite/en/

MusicApp has just renamed into Opus If you want to download the app, check on the Release tabs.

This is an android app for playing music from local file or from youtube (while screen is off). You can as well edit metadata tag and manage playlist (local one or youtube one).

Screenshots

If you find an issues or want to contribute to the project, open a request here.