I’ve been using YouTube Music for a long time. I encourage everyoneone to download the Revanced Manager (link here) and mod the original APK (you can download it from anywhere, namely pureApk or uptodown) by yourself. The process is incredibly easy and you can have almost all advantages of premium without paying a penny, like with the modded Spotify APK.

You can use Parsec. It’s free and closed source, but it has an optional driver that, if you install it (you will be asked during the main installation) it will allow you to use Windows in remote without an attached screen. I tried it and it worked quite well. In the remote device you can even select at what resolution you want your host computer to cast when there is no screen plugged in…