Didn't watch the vid but I like that guys stretching videos, always do them before I play.
But to answer the question (for people who think it looks slow, I don't think it does?) would be because the technique and vision and composure is such a high level that they make it look like they always have time on the ball and are so quick to think. Throw yourself in there and you'd be panicking every second because of not having space or time. Great players make it look like they always have tons of time and aren't rushing, and you wonder why can't everyone do that?