I thought your form looked good, but it appears as if you rush the shot a bit. Maybe slow down the foot work a little so you can slow down your armswing as well. They both appear to be forced judging by the video. I know a few people that tend to throw the ball with a very quick armswing like that and most of them tend to be very inconsistent with hitting their marks. If it works for you, stick with it. But, if you struggle hitting your mark consistently, it would hurt you if you decided to try out any tough shots or the sport shot for example. Other than that, I'd say you have a pretty good idea of what you're doing out there.
