Nice video, I like alot of your game.
Your serve looks like a place you could find some improvement though. It almost looks like you are crouching when you hit the ball rather than driving upwards.
I won't begin to tell you how to fix it, as I am no expert. It just seems to me that you could be making contact about 10" higher giving you a better angle into the court.
Völkl PB10 Mid / Pro's Pro Hi-Tec Multifiber 1.30mm @ 55lbs