If those weights are real, regardless of if the guy is serious or not, he must be a complete dumbarse!!!
Duno how you can tell how much weight that is exactly, however you wouldn't want to deadlift any remotely serious amount of weight in such an improper way. It *looks* like quite a bit.
The problems will not necessarily occur now, but many years down the track.
Only if they're heavy for him, he isn't deadlifting much for a 1RM in that video
Very good p#ss take of DW though, this is the real thing
Hopefully this video is fake.