I have to be frank about this, but he really does look physically uncomfortable. He is very much moving in a protective manner, a defensive manner. His stride is very short and choppy and the swishing tail and all, to me say physical discomfort. I know you have made a lot of inquiriies into this and I dont' want to come off as ragging on you, but his physical state is very evident in his way of going. It will probably be evident to the judge, too.
For yourself, you are bracing into your stirrups and posting off of them too much, and coming back into the saddle with the down stroke too much into the cantle and not into the very middle of the saddle. I would suggest shortening your stirrup one nothch and really work on bringing your lower leg under you more and using your leg, knee and thigh in the posting motion so that you can sit down softer and more centered in the saddle.
Your hand has gotten much steadier and your position from seat up has also improved markedly.