I know this probably wont be of much issue in the future but apparently the Lobby song for flee the Facility is Copyrighted. So I would recommend not monetizing any videos with the lobby music in them. The song in question is this one with some of the sounds removed - (while this probably won't prove to be a problem in the future I just thought I'd put it here in case this ends up being an issue)

Edit: Part used in FTF starts at the 29 second mark

There's an option to turn off the music y'know

I know just warning everyone.

Apparently, the background music during games is copyrighted as well.