The video is from 94, back when people didn't understand that you had to practice fighting to be good at fighting. Truly this is only a few decades after people discovered that you had to exercise to be good at sports at all, so you can't really blame the guy for thinking that you just had to be big and strong to win a fight
It’s probably the most equalising martial art, no matter how good you are at striking and how much bigger you are, if you can’t defend a submission you are probably getting beaten
Even Anderson Silva lost to an imanari roll into a heel hook. Can’t enter the matrix if you’re on the ground