The thing that helps me with my pull hooks is to feel like I'm getting my right shoulder lower in my downswing. Feel like you're trying to point your right shoulder are the ball.
Pulling the ball? Camera angle may mean I don't see this as it is, but it looks to me that in the slow mo your shoulders may be open at impact. If you can delay the shoulders just a little you may be able to reduce the pull. The other feel is to swing your arms down and across your torso not pulling around your torso letting the body turn square you up. A pronounced lower body shift helps me do this. Having said all this your full speed shots shown go straight and I can't really see the problem. If as you seem to say it has started to happen later, then you may be chasing the extra distance you say you are getting by throwing the shoulders and they catch up to the hips too soon and as such are way ahead of the arms (again not shown in the shots shown in the vid). I say this because it is what I do when I am chasing distance the wrong way. I have to stop and practice lower body shift then down with the arms then turn (my fee we all have a different mental thought to get the feel)
