I'd hoped to have this up in time for my chat at BP today focused on pitching mechanics, but YouTube spit the bit on the video conversion AND pinged me for copyright, so I had to make some adjustments. This video takes a look at the oft-misunderstood concept of "stepover" using CC Sabathia as an example. Here's the video:
Hope that helps clear things up on this. Video is so much easier than prose when dealing with mechanics!