Are you serious? You might want to watch the video agaain. It looks indisputable that the little boy was crying about the ball.
Serious as a heart attack. I've taken a toddler to baseball games; any number of things can get them crying. I think it could just as easily be the noise or the commotion. Have you ever been to a major league baseball game? They get loud, and it's obviously way past this kid's bedtime. Nothing "indisputable" there for me.