Update: Here he is 1 year later in the London Olympic training hall.
Update: A fellow redditor in r/weightroom found a second video of the same squat. According to which it was only 320kg (see 2nd video below). Nonetheless he made it look way too easy.
Here is a video of a big 360kg (800 lbs) 320kg (705 lbs) squat by Behdad Salimi.
Note that this is in the 2011 Worlds training hall, prior to setting the new snatch world record.
Look at the expressions of the other lifters.
Different Angle.
Thanks to the anonymous commenter for the link.