IMO, follow through is a non-teach. Do everything right beforehand and the follow through will happen correctly, out in front.
The difference in those videos of Lincecum, Johnson (who DOES finish out in front) and Verlander is how their glove acts in front. If that glove stays out in front (check out Johnson’s glove position, awesome), keeping the front shoulder from rotating past the target, the follow through will happen out in front. If the glove pulls down or back (Verlander) the front shoulder pulls off the target and the follow through happens back in the stride.
Follow through drills (pick up the dollar) are pointless. If you do everything wrong and open too soon or pull your front shoulder back, you can’t alter your arm path after release to get it out in front, its not possible.