That video doesn't prove anything tbh, especially since they took the goddamn sound out and added in that terrible music. Every time they said he was "scanning walls" I didn't see anything strange at all, and "checking corners" is something any non-idiot should be doing.
The 50 second mark is the only part in the video where someone could think he's cheating, but theres no way he didn't hear the guy coming.
I'm not saying the guy doesn't cheat, because I've played with him and I know he does cheat, but this video is a pile of shit and proves nothing.