That's interesting. It seems to have much earlier break than MLB sliders today. Of course, there is significantly more break as well. Because it comes out flat from the hand, unlike a curveball, it seems to take a sharp downward left turn about a third of the way to the plate.
I wonder what pitch the speed was thrown at.
I bet someone on this board could probably narrow it down to within a few MPH (tomterp?). The video seems to be in pretty accurate time and we all know it's 60' 6" from the mound to home. This could be an SAT question.