The one big thing that gives it away to me is the colors are an insipid yellow not orange.
Will will be along in a moment to tell us "Don't worry, we've asked our development department about this video and they say they are removing the tripping hazard. Thankyou for drawing it to our attention ...... oh wait ! "It could be real for few reasons:
Fdev always posted here when something was fake. In fact they never commented the leak. Let's see if they will comment here.
Made this 2 years ago...Too bad it's a fake. I was about to say: "Shut up and take my money!". Disregardless of the "quality" of the scene - it's an atmospheric ice planet, i was excited they might be working on it, but meh...