Let me try at this one.
What I am picking up is that your drawing hand and your bow are dropping after release, this is due to lack of back tension and holding on target. When you release you can either have a dead release, where your hand stays against your face, or your hand should come straight back and touch your shoulder. I also think you can gain a few more inches of draw length if you actually squeze you shoulder blades together, this will help with your back tension. One question I have for you, are you using the technique of string walking for aiming? The reason I ask, is because it looks as if you have a gap between your top finger of your drawing hand and your arrow nock.