Notice how his hands move and where they are. I doubt the fish would still be paying attention to your hand if it was far behind it. Ive noticed that fish wont even realize food is there if it is far behind them. If you follow along and try to learn the commands, you will find that you wont even be able to learn it because its all random, so how the hell would a fish learn something we cant learn? I doubt fish would be able to make sense out of something that makes no sense.