For me, I use part of his technique, but if I try to shoot as fast as he does, it doesn't work for me. I do swing draw, but if I am going to hit something, I need to hold at anchor for a couple of seconds. He describes 'push pull', which for me is the way that I will put arrows in the target. If my 'push pull' technique breaks down, I don't shoot worth a hoot.
I don't know if that is why you are having trouble with his method of shooting, but if so, try holding at full draw for a little bit and then pushing with the bow arm and pulling with the string hand, and see if that helps.
As far as his not seeing the arrow and total concentration on the small spot on your target, I am with him. If you are a gap shooter, you might have trouble with his way of shooting. I don't see the arrow when I have total concentration on the target.
We all are different, so trying to use his exact technique might need some tweaking for you.