Dude, when he touches the goal post before he touches the ground, he is OOB and the play is over. There is no penalty.

Poorly worded, but I think he means that you are more likely to have goalposts right on the end line (most likely one of those H-shaped dual purpose soccer-goal/football-goalpost things) on lower level games (like JH or youth) than at big-boy ball where they have a dedicated football field with proper goalposts.