Question- in the video of the jet engine starting up as an example of what the swirl looks like, it seems that the blades start moving in one direction (clockwise maybe), and then spin the other direction, and then change direction of spin again. Is this an optical illusion?

He did? I really want to watch the vid but I’m at my dead-body viewing limit for the day

So this is another installment of the Starship Troopers prequels?