RE: funny video
I think it's a direct drive tail setup. That uses a smaller rotor. As for the height, he must have modded it somehow, but I'm not sure exactly what was done...
I think the thing that cracked me up most is how he doesn't even really try to hover or anything. He just hits the gas and hopes for the best! Also, after a hard landing or crash, he doesn't even go over and look at it. He just hits the gas and flies again! LOL