Not bad. There is a lot of things that you've got right. However, it does appear that you rotate/uncoil too much to the left. You actually are falling in that direction on many of your serves. You should be rotating (shoulder-over-shoulder) more upward as well as forward (toward the direction of the served ball). Try driving your right shoulder (and right pec) upward toward toward the sky/ball. On some serves you seem to be driving forward (and to the left) more than upward.
When you land your left foot should point toward the target area (not off to the left). Your back (right) heel should kick toward the back fence -- your right leg should not kick off to the right (as it does in some of your serves).
Every tool is a weapon -- if you hold it right. (~Ani DiFranco)