you are inconsistent in your push away which leads to you missing your make to the left. your swing is a little early which is why your foot is still sliding when you release the ball.

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high game 300
 high series 810
 high ave. 223
 bronze level usbc
 coach with the pros 2nd yr

in your video why did some your shot go high? ...................because your swing was ahead of your feet. sometimes you drop the ball into the swing too  quick and the ball beats your feet to the release point and you cant get the ball out to your target.
take a  side video of you bowling ( ball side) at least 15 shots and see where the ball is in your swing on the 2nd step . stop the video when your right toe touches the approach on your 2nd step a note on each shot what the ball did .
shot 1 pocket
shot 2 high ect.
on the shots that the ball went high where was the ball in your swing on your 2nd step/
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high game 300
 high series 810
 high ave. 223
 bronze level usbc
 coach with the pros

Edited on 9/10/2008 10:13 PM

It seems you have a lot of lateral movement in your body.  Not including your approach to the line.   Your body doesn't move very linear therefore increasing your risk for errors.   The more "robotic" Linear you can be the less chance of mistakes to the foul line.  If you stay compact, sturdy and strong, you can throw the same shot time and time again.
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High game 300
High series 804
High triplicate 774
High average 221
best game. when I was 6 I bowled a 158