game developers

Hi, Any feedback on my latest vid welcome! Mostly wondering if it plays well and is a good watch.

So i'm going to start adding a bit of game play footage to my channel. How do I go about getting permission for the games i play? I was told to contact devlopers. I'm not sure exactly how to go about that. I'm new to gaming area on youtube and i don't want to have any strikes on my channel. Any...