Linear,
I applaud you for posting the clip. It looks as though you do a fine job. The second clip clearly illustrates the technique that I use with many of my catchers. I did notice that when watching both clips side-by-side that when the ball was in the loaded position after transfer that the same position was obtained. Do you feel that moving the feet slows down the transfer? If the transfer is not changed and the throwing position is obtained at the same time frame then it may be a factor of an individuals ability to gain the correct throwing position the fastest. I do think there are times when you must catch and throw and do not need to move your feet. I would worry about a catcher getting used to not having quick feet to move to the ball and doing too much reaching as opposed to moving into throwing position as they bring the ball in from a difficult location. But, perhaps I can be persuaded. I never close my mind to new ideas.