This type of stuff happens more than you think in the world of competive sports.
I have seen it and been on teams that had that type of coaches, bully usually start with these type of authority types. When you are young and love playing sports, you sometimes endure more than you should.
Real piece of work that fella is, if you seen the video, all the kids should be able to line up and each take a few turns throwing the basketball as hard as they can right at his crotch area. That guy is a flat out idiot!