Oh, wow - I had seen a version of this, years ago, as; I believe, a commercial.
It was a much, much better and far less obvious version, I can't tell because obviously I knew what I was expecting, but I strongly feel with this 1999 version I absolutely would've caught it. Very poorly done compared to the other one I've seen.
Ah, here it is, this one uses a 'moonwalking bear'. Upon seeing them both again, I 110% agree with my assessment that the bear version is far, far superior.
The space the original video uses is too small, and maybe it's that the camera angle is poor; it's so hard to tell but I'd honestly be surprised if too many people fell for the original today.
I actually had troubles following the ball because the gorilla was just too obvious and distracting.