I have watched a couple of pros run balls using a GoPro Head Cam, the latest was Max Eberle a rack of rotation today on Facebook. It would be interesting to see some 90/90, or "real CTE" guys do it. It definitely gives a great perspective, and I believe is an awesome teaching tool for aiming and English.
Here is Max's
https://www.youtube.com/watch?v=BvaKCJCKLQ0#t=48
Here is Max's
https://www.youtube.com/watch?v=BvaKCJCKLQ0#t=48