Well, I KNOW one thing: keep dunking on the low rim!!!!! Reasons: sharpens technique, dunking is great for getting better at....dunking, and it builds confidence. All are key elements.
As for suggestions, try a few attempts without dribbling. You seem to be paying attention to the dribbles quite a bit instead of focusing on the runup/plant/takeoff. Take away the dribbling for a few attempts and your focus will be where it needs to be. Side bonus is you have back to back video to see if your run up is actually slowed by dribbling.
