Two things:
1. It's an awful look, because any athlete in the modern age should be able to figure out the headache they're causing their school by doing this. The kid is obviously immature and needs to get it together.
2. I'm not sure why some are assuming those are all hundreds. The only time the video slows down enough to see a clear number is at :19, where there is a giant zero in the corner of the last bill. On hundreds, the zeros aren't that tall nor are they that fat. It's probably a 50.
If 50 is the best he has and he's not spreading out the middle ones to see like a real baller, is he really balling? Wouldn't you want people to see all the hundreds, especially on the outside?
If any normal kid has the middle numbers hidden, wouldn't you assume that they were lying to get attention?
That whole stack could be 50,000 or it could be 500 depending on the bills that he is hiding in the middle. Which do you think is more likely?