Mike Van Wyck proponent here. The dude knows his stuff training and can handle himself. That said, there are tough dudes everywhere and are not often the loud guys
As far as the way he looks now or onstage back in the day, doesn't really indicate if he can help people with their training or not.
I do find the whole series of vids on "height and weight" funny and entertaining. Julian Smith's meltdown and the wrestler that was going to take legal action are pretty funny