He may have done 4 plates. I don't know - is that a new or old video?
Edit: ^ Lol, there we go. Why is he low 70s though? I don't know, he's been lifting for so long I'd just bulk up. Rarely will you be strong at a low bodyweight. Regardless of whether he's meant to be small/ecto. I was ecto too! Sure my legs and ass were a bit bigger but my upper body was tiny. Now it isn't. Just a lot easier. I'm confident I could cut fairly well and still have 180 or so in me. Usama was like 76kg and he hit decent squat.
Seems rather poor progress really for all these years.