Thanks again for the clarification.
I had a coach comment on my video on upmygame.com and his suggestions are sound. He commented on my 15 yd and 40 yd. I did feel tense, like I was pushing against a wall, on his runs. I particularly found his comments about my arms reaching forward and sweeping back, and the ensuing mechanical issues that occur because of that motion, to be particularly helpful. View here if you want to see the comments.
Anyone know of a coach in Portland, OR?