Virtually nothing to work on, I say. Probably the best mechanics I have seen posted on this site, in my opinion. If I had to nit-pick, I'm not a huge fan of the big step to the side, but I don't think it is affecting the rest of your delivery. One other thing is your glove position as you rotate your shoulders; because you keep it kind of high it can block your throwing arm from following through to a complete finish and prohibit proper deceleration. I'd prefer the glove to sit at your hip as you finish.