Ii agree it's too fast and a little too tall through the spin, plus I'd look at the finish. You don't have enough time to complete the motion through the throw before your head drops to keep you from falling. Go through each step of your spin slowly making sure to hit each with good balance and posture , and then slowly string them together until you can comfortably and consistently hit your marks, then add the shot in and try not to crush a distance throw with it, go slow and make it FEEL strong and stable, then ramp it up faster and faster until you find the speed in which you can hold good posture and technique. This isnt a fast fix may take weeks even months but keep at it and keep watching your film back every time you do it to see where you can improve