I'm no expert and have been getting advice myself, but I'll go fer it!
A couple things I noticed is you are just collapsing, as stated above,
and your release IS consistent, but your release hand comes out away from your face, try to keep it in line with your bow arm as you release. When you slow your vid down you can see you lose almost 2" of draw before you release, and that can affect a LOT!
Also a tip on your shooting, start off with your bow held close to your torso, and push with your bow arm the same time you pull, it will make that bow a LOT easier to handle. I notice you line up with your arm extended, so that might not be an option, its a lot nicer to use the push/pull method when dealing with 50# and up though.
Good lookin form though, a lot better than mine. I also need to get the whole "pause" thing down.
Take care,
The Kid