Here's a link to a loop provider I like. In addition to the usual fare (electronica, trance, etc) this place also offers quite a few libraries for cinema/home movie/trailer etc. The sounds fill the full spectrum of effects, music, whoosh, explosions, spooky, sci fi ... you name it they probably have it. And in my opinion the libraries aren't that expensive.

I know there are others in the group who make videos, so its probably worth posting the link.

https://www.bluezone-corporation.com/

They have lots of demo clips. You could spend days just exploring the possibilities.