Youtube license & monetization

I am a YouTube video creator and I’m planning on making “Let’s Play” (commentated gameplay) videos of the Black Mesa mod once it is released.
I would like to know if it’s possible to obtain a license for world wide commercial use of audio & video capture/recordings of this mod.
The reason: YouTube monetization (i.e. placing advertisements on the video) requires a commercial license.
Thanks for your time.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.