I am new to UT OS , when I was look Youtube Music its was just running in webview and there was no way control the music from home screen
Added Custom Media Player

Added Play and Pause from Bluetooth headset (Tested on Airpod 3)
https://github.com/symbuzzer/musiki2/pull/1

I am still working on make more bluetooth commands accessible for next and previous songs

For Background UT twek tools or unconfined package can be used