I like the side-by-side-by-side comparison concept and agree with Richard on using a crosshatch background (with grid dimensions noted).
Your video makes two things stand out:
1. Little pistols kick briskly. We get used to the movement and compensate for it with practice, but the recoil impulse is still there.
2. The "thumbs forward" grip the shooter was using is pretty standard for full size 1911's, but scary for the little guns. I don't like the concept of having the tip of my support thumb forward of the muzzle during recoil. Personally, I curl my thumbs down, revolver style.
S.