Info,
I wouldn't consider either of the pitchers shown to be short armers. They both scapular load, but the ball seems to get outside of the elbow when behind them. The 1st video of the Sox pitcher is harder to tell from the angle the shot was taken. He almost looks as if he comes back inside his elbow once loaded, but I would definitely say that the latter pic is not short-armed. He has great flexion in the arm and gets out in front real well.
Usually IMO, short armers are more rigid in their arm action, their hand and ball stay inside their elbow for the majority of the delivery, and the throw is cut off in front.
Again, the sox guy...possible candidate, but not the second guy. At least not from the angle shown.