The fan is trying to use good (ish) form like an NBA player but he's not getting enough oomph from his legs and/or wrist. Seems like he releases the ball a little early....or at least he doesn't get high enough on his jump shot.
Probably shoots around at a local park or gym but not 3s from true NBA range. Bet if he stepped a bit closer, he'd hit some shots.
Seems uncommon to find a local court with NBA dimensions for the paint/key, 3pt arc, court length/width etc. He thought he had range but was practicing "three pointers" that are the equivalent of a mid/long 2 on an NBA size court.