Couple things. Like Hardhed said, the bow arm and drawing arm both drop before the release. Your drawing hand actually ends up below your chest.
You are not hitting anchor with any consistency. It looks like you are bunched up and "reaching" for the anchor. Your drawing arm is not back and the elbow is off to the side which suggests you are not getting near full draw. Shoulder alignment is pointing off to the left and the bow arm is turned in to the body which is also going to reduce your draw and add to the bow movement and loss of stability.
I would work on the bow arm and shoulder first to get them lined up. That will give you stability and then you can concentrate on follow-thru and the release. Just work on correcting one thing at a time though or you might not recognize what's working for you and against you.