I like what i see. Everything is on point. Steps follow what you want to do, great slide, better follow through and knee bend.
Two points, 1. Dont grab thru the ball so hard, if you need to amp up speed, do it with you legs and a higher start position of the ball. It tends to pull you off the ball. As a fellow big man i can sympathize. I have the same problem at times.
2. Make sure that you continue to post the shot till the ball hits the pins. Not so much a problem, but it can lead to falling off. This falls in with #1. If you post then you know where you finish everytime.
Other than that looks really good. Keep up the good work.