@shack: Re: the video in post #7: That white rectangle is not a pitch tracker. It's just a video overlay, for the benefit of casual fans who might not otherwise know the location of the strike zone. It never moves, and it's present before, during and after each pitch. The players, the umpire and fans in attendance don't see it, because it's just a TV tool, not unlike the
FoxTrax
'halo' around the puck and the blue and red streaks for passes and shots, from when FOX broadcast hockey in the mid 1990's.
If you look at the BALL, it passes through the rectangle when it crosses the plate on each of the three pitches. That's the only information that matters, when determining if the pitch is a ball or a strike, in the absence of contact between ball and bat.
Angel Hernandez made a lot of bad ball/strike decisions in life, and specifically in most of the videos posted in this thread, but the three pitches in the video from post #7, (Houston vs Texas; Langford batting against France), are all strikes, and correctly called. In this case, it's the commentator who is wrong.
His assessments are based on where the catcher caught the balls, relative to the overlay.