There's a company called AUDIOMACHINE.com offering real top notch epic music with awesome orchestrations you can use for a bargain YT license (25 US$) for your project on YT. Many tracks are used by the cinema industry.
We have used it and it's serious business.
I am not doing their publicity and have no interest in the company but just inform you. For those who are serious about editing with
ambiant music, have a look: audiomachine.com
Good luck.
Alain II