These people are just idiots using crossfit as a way to get people to come train at their gym, they're putting people at serious risk using that much weight when people can barely do the form properly. The crossfit routine would be fine for these people is they would just use the right weights and were shown the rights forms.
A good crossfit routine can be good for anyone, just use the right weights and make sure you know all the movements properly and you should be fine. These guys were begging to injure they're trainees. Couldn't even watch the whole thing.