Youtube & Monetarization

[MrMajoran]

Hello FrictionalGames-Team and Forum-Members!
First of: English is not my main-language so it can may be a pain to read it

I write this post here to ask you if it is allowed to record and comment (to letsplay) Amnesia: The Dark Decent I bought a week ago on steam and upload it on youtube.
Next thing is the monetarization (earning money with ads on the video). Is it allowed or not?

I'd like to ask before my videos get deleted.

Thanks and sorry if this is the wrong forum-part or if this question was asked before.

EDIT: Of course I would write down in the video-description that the game is made by Frictional-Games, that I just played and commentated it and link to it.

Kind regards