Wow. I’m going to assume the little brother’s arm is in a cast because of his big brother too.
As a parent, all I can think of is how bad I would whoop my son’s a$$ for doing this to his brother and be thankful that the little bro’s head wasn’t just a couple more inches to the left. After a few swipes with the belt, I would then tell the oldest son that he still got dunked on despite the dirty move. Then I would show the little brother this video of Kobe falling and making And1 shots.
Now here’s a more “friendly” video of a big (real big) guy abusing and showing “no mercy” on a little kid.