Who makes money out of YouTube?
Do you listen to music through a streaming service? Increasingly that's the way people choose their playlists - and it's one of the most competitive markets.
Apple is set to launch its own music service. Spotify has just announced it's adding video to its product mix. Then there's Tidal, re-launched by musician Jay Z.
But one of the biggest streaming services is Google-owned YouTube.
Ali Moore asked YouTube's Global Head of Music Partnerships Christophe Muller, who makes money out of YouTube.