I don't disagree with the late timing comment, I personally don't mind seeing it based on having watched a lot of modern bowlers bowl really well with late timing. Diandra Asbaty comes immediately to mind (as was recently discussed in another thread), she would have neither her leverage at the line nor her titles and accomplishments without late timing. I can't tell if yours is caused by timing of the pushaway or if your feet are maybe a little fast/
I like the way you hold your position at the line until well after the ball is headed down lane, glad to see that. I mostly like what your balance arm does, although I'd rather see thumb-down, palm-back at the line (it is cut off sometimes in the video but it looks like palm-forward?)
It seems like your swing is a little too "inside-out". In other words the ball is way behind your body at the peak of the backswing. Some inside-out in the swing isn't bad, I'd suggest starting the ball a little more to the left to get your swing a little more in line with your target.
As Dennis said, you're topping the ball. I'm guilty of this myself and it's something I constantly work on. Especially with your ball speed your shot will stay on-line better if you can get more behind the ball. When I posted about my topping problem, one of the guys replied with the following article which I liked a lot. http://bowlingknowledge.info/images/stories/slowinski_march_article_09.pdf
Nice looking game though, heck of a lot better than I rolled the ball at your age. Keep up the good work!