I think that ball Hazem was kicking had air and helium in it. It still looked heavy like a proper ball but it floated with momentum.
The footage was clearly fake, some of the kicks actually gained speed as the ball progressed.
I can't believe anyone thought it was legitimate footage, they did everything in their power to make it look fake.
Balls can't "float" with helium, their mass is still way heavier than air, at best a ball filled with helium will weigh 10% less, and anything that has less weight, but all other things being equal, actually slows down quicker than something that is heavier provided they are hit with the same force. Try throwing a stone about the same size and shape as a cotton ball, see which one goes further.