Hi, great video, thank you very much for sharing.
However I do not very well follow all of the explanations and specifically the stance issue:
• The trigger/aiming concentration issue is well known although not consensual. Even some international-level trainers argue that operating the trigger should become an automatism and concentration should remain on aiming. There are different schools on that subject.
Anyway that is difficult to relate to stance more than stability in general.
• What I don't follow is that the video doesn't at all justify why the bad trigger operation would be caused by stance and not body or arm(s) or wrist stability in general. As for pistol shooting at least I don't agree at all: stance is by far easier to acquire, train and master, than shoulder/arm/wrist stability. Stance directly affects the way you want to control stability but this does not directly affect trigger op. When it comes to rifle standing position, my understanding is that upper-body position, relaxation and stability are far more difficult than stance at the feet level, and neither does it directly affect trigger op.
It doesn't contradict stance stability being a real issue but it simply doesn't at all explain why it would be related to trigger op, although this is the video's main subject.
• He also mentions the urge to breathe but here again I don't agree: experimented shooters have long mastered this issue, whereas for beginners the urge to breathe mostly generates upper-body contractions, specifically diaphragm and pectorals, which completely ruin your aiming. Nothing about stance there. In a second time, urge to breathe generates urge to shoot without control.
Also the "good" aiming pattern with a moving area smaller than the 10 ring is really top competition level whereas the "bad" one is beginner-level. It doesn't make sense comparing them, and stance stability problem even for an average shooter would certainly not have such a strong negative effect.
So all in all it is an interesting video and efforts to make these have to be supported as there are not so many, but to me this one is too misleading and lacking good explanation.