There are cards out there that will let you capture video from your VCR and transcode it to a PC format.
However, your money (c. $200) would probably be better spent on a digital camera that can also take short video clips (preferably saving them in the QuickTime .MOV format).
As the shoulders start to turn and the upper arm externally rotates, EVERY pitcher’s hand ends up under the ball. My concern is that he may be telling you to fix something that isn’t broken.
For example, here are a couple of pictures of Chris Carpenter with his PAS upper arm externally rotated and his hand under the ball…
It is PHYSIOLOGICALLY IMPOSSIBLE for a pitcher to keep their fingers on top of the ball throughout the throw (and I wish pitching “gurus” would stop telling people that they need to always have their fingers on top of the ball).
First of all, every pitcher “catapults” the ball to one degree or another. Second, there is a tremendous amount of variety in the arm actions of pitchers. Not everyone comes to the traditional high cocked position.
I think these drills are dangerous because they teach you to do something that is neither necessary nor a good idea.