The dude is short and carries entirely too much fat for the "hurrrrr, gotta have abs!" bros; still, he obviously has a lot of muscle, and if you watch his other videos, he moves some very good weights.
Moreover, IF he is indeed natural, as he claims, I find it more than a little odd to single him out given the tons of twats out there who admit to drugs and couldn't do a single with what this dude uses for a 5x5 session :/
Mind you, I also question why he'd post that curl vid, which isn't impressive. But that doesn't really detract from the other shit he's done, like a 205 kg raw bench.
Natty or no, lean or fat, the kid's strong.