Hello, thanks for your message.
You can find our Youtube monetization policy here: http://www.focus-home.com/company (bottom of the page)
We are fine with YouTube monetization using recorded video material from our games as long as the video is somehow related to the game(s) in question (e.g. review, preview, a Let's Play, or some other similar type).
Also, it is allowed to use the music from the games in connection with videos related to our games. However music used outside of videos of our games is not allowed.