They work out hard. Yes, there are lot of beginners on youtube. What if they filmed a guy at your gym that just took up lifting and made fun of him. There are a lot of crazies on film claiming it's cross fit. There are a lot of good crossfit gyms out there. The elite of crossfit are insanely fit.
It's just another form of working out that doesn't follow the bodybuiding body part system or the low set power lifting model. The truth is most bodybuilders would be humbled walking into a crossfit gym trying to keep up.
hahahahahahahahahaha oh, brother

"Oldtimer1," you sound like one of these cream puffs who bitches, "Well, those girls on the field hockey team work every bit as hard as those football players, so they should get the same benefits!!"
A bodybuilder would only enter a crossfit "gym" if he were "curious"