use youtube as radio or non stop music player

Today I discovered two great services offered by YouTube. 
First YouTube Leanback –
YouTube Leanback is effortless as watching TV. You type what you want to see and it will keep playing videos (in full screen) of your desire. For example I put in Robbie Williams and it kept playing till I stopped after around 14 songs.
Great when you cooking or exercising !
Second is YouTube Disco –
You can enter any music group or artist, and a playlist pops up, You can find related artists, create a mixtape, and save playlists. This seemed almost similar to above.
I searched “Dil Se” in disco and it found 100 tracks of A.R.Rahman.

This is streaming videos so it is using more data download than online radio service.

Mrugank Patel