I will most definitely work on bending the elbows more. I flex him before & after we are done working. I normally do circles and stretch his neck but, honestly he really doesn't get it. As for, my lower leg a lot of people say is not underneath me enough and a lot of people say it is.
Can't people just tell me one thing & stick to it. I am posting with my horse. He has a very fast, working trot and I was rising with his leg so, I know it looks like I'm not posting with him and trying to rush it or going faster than, he's trotting but, I am actually rising with his leg. I am actually more light with my seat than I am hard, definitely not slamming down on his back.
I just re-watched the video and stick to my former statement of your leg being too far forward-If, when you are in the saddle, you look down and can see your toe, it's too far forward. Your heel should be a straight line from your hip. It is possible you do this defensively since you mentioned he was being stressed out. I would like to see him when he is not in a stressful situation, just for the comparison.
Hopefully the Dressage trainer can help you with the suppling and maybe have some ideas to help him "get it"...I think serpentines, legs yields, and a little further down the road counter-canter would help you and the horse greatly.