Oh God, I couldn't even make it through the whole clip, too many flashbacks.
I'm a summer camp counselor, and I frequently work with younger kids like that. Even if they do something wrong, there is absolutely no excuse for putting the child through physical pain. And even worse, belittling him when he's already emotionally distraught. I've been there. When you already feel terrible, and just want to curl up and cry, but your mom won't stop screaming. It's not pleasant.
Whatever happened to just talking to the kid about what happened? When one of my campers does something wrong, we just tell them in a calm tone that it's against the rules which are there for their own safety. We explain the situation to them like they're an actual person. The only "punishment" (and you have to really screw up, like punch another kid, or set fire to something) is losing five minutes of time in the swimming pool. And you know what? It works. Moderate, sensible punishments for truly bad misbehavior, and talking things out for everything else works 99.9% of the time. There's no excuse otherwise.
/rant
Sorry for the rage, but as some one who works with kids, and some one who has experienced this first hand, this really hit a personal chord with me.
Also, the whole time I was watching, I kept thinking that little boy needs a hug, some cookies, a big glass of chocolate milk and an Xbox for all that crap.
Also, maybe a puppy.