^^^^That guy in question, is Charlie "Krazy Horse" Bennet, another MMA fighter who is more striking based. He previously claimed that he KOed Wandy Silva backstage at Pride. Chute Boxe, Wandy's old camp, put out this video to dismiss all of Krazy Horse's claims. Size and strength does play a role in fightinig. Brock Lesnar is a monster, BUT HE is crazy athletic. Something, most pro bodybuilders are not.
Bodybuilders win bodybuilding contests, and train accordingly. Fighters are trained to fight. Kind of the show dog/game dog analogy. One is bred for confirmation, one for confrontation. Apples and oranges.