Yeah, there's this add button under a video and you can make your own playlist.

But music sure does help. When I'm in a bad mood or whatever, music keeps my thoughts away from all the crap. It's like my own little creative bubble. Plus - time passes so fast when I'm making music or doing something else that's creative. And with time, my emotions pass too. So yeah, it definitely helps.
That's one thing that my last psychologist told me too - that I'm good at giving myself therapy in that way.