You have a very muscled swing it looks like you have a death grip on the
ball probably because of poor fit. When bowlers have such a muscled swing it is usually because they clench their thumb in the hole trying to hang onto the
ball. Once the thumb is clenched up like that it tenses the arm up all the way to the shoulder and causes you to swing the
ball by twisting your body.
You need to check your span first by placing your thumb in the hole and laying your fingers across the holes with your hand relaxed, the front edge of the holes should be no longer than 1/2 way between the first and second knuckle of your fingers, if you have to stretch your hand to achieve this, then the span is too long.
Next is thumb hole size most people who have a problem with muscling the
ball have a thumb hole that is big enough to accommodate a bent thumb in the hole and the more the bend the thumb the tighter the hole feels, so they keep getting the hole opened up and then they keep squeezing the thumb more to hang on it is a vicious cycle.
You probably need to have your thumb hole tightened up to fit your thumb without bending it. Once you have done that and the
ball still wants to fall off your hand then you need to add
tape in the front and back of the hole, if it still wants to fall off then you need to go more forward with the thumb pitch until you don't have to squeeze to hang onto the
ball.
After you get your thumb fixed, alter your push away so that it is inline with your target and shoulder, right now it is way outside of your shoulder and you pull the
ball back while twisting the upper body then untwist and hoist the
ball out on the lane, this is not a muscle sport, most of the pros are not body builders in fact Lynda Barnes beat Sean Rash yesterday, and neither of them use a quarter of the effort that you put into a shot.
If you really want to improve your
game, find someplace to bowl that has underground
ball returns, or have that place put enough oil so you don't have to bowl next to the [censored]
ball return and kick your ankle off, that has to hurt after a
game or two.