Tom Platz doing 498lbs 23 times...
all I can say is OW
He's done a lot more than that. And in that youtube vid if you're refering to that one, it's more like 540. There are collars and a 10kg plate on both ends, but this is not visible to the camera from that angle. Also, Tom was less than 200 lbs bodyweight.
635 for 15, 600 for 20, 585 for 23, etc. I have verified these numbers with Tom.
Platz was one of the best squatters of all time. Max of 775 lbs without 1rm specific training...!!