The list of trickeries is never-ending.
Scott Fagdonald from bb.com, Hulk Hogan's 24 inch guns, Bradley Castlefuck's bench presses, Melissa Dittweiners 10 reps with 3 plates on squats, Heather Darling's supposed 550 lb raw bench press world record, etc etc
Now to my DREAD...
The dumbbells do not weigh 100 lbs.
They were FAKE. Research the ironhistory.
You can, in fact, also tell if you examine the vid closely.