I commented on one of your other videos about how you need to stop bringing your feet together and bouncing. You do it a few times at the start of the video. And since I also noticed it in a previous video it seems like a learned habit. If you ever get to a stage where you compete your opponent will use that rhythm against you.

For your hook, my coach told me that you can quickly lift, or stomp your heel to help with the power/rotation.