I dry fired for a good solid 5 minutes and I found myself occasionally reverting back to my old ways like in the video (45 degree pull on the left side if the trigger), so I will continue to practice, practice, practice. I also discovered that I can perform the same collapsed joint trigger pull against my left thumb to practice the technique much quicker than with the gun. I know how to shot, I just need to develop the correct muscle memory now.
Thanks again. It was the epiphany I needed.