He's good, but I wouldn't go as far as calling him a guitar genius. Plus, pretty much anyone can cover a song, a bit harder to actually write it. Don't want to sound too critical about the guy though, plays good, but if you really want to see some guitar magic, check out the likes of Yngwie Malmsteen for example.
Watch some of his other videos, I think youll change your mind
P.S malmsteens music is beyond horrible, as is Steve vais
My favorite YouTube guitarist is Tony R. Clef with the username 'troublechef'. He plays the notes of just about every instrument (including the vocals) when he covers the songs. Some of the songs capture the same feel as the original and that's an incredible to do with just an acoustic.