Here are some things I would try:
1) (and this is a BIG # 1): keep your bridge hand on the table. Pretend that your bridge is a block of iron bolted to the slate. Trust me, there is NO downside to this. I break 27 mph and can squat the CB center table regularly. This one thing will double your control.
2) Delay your swing more. I have found after many years of practice and observation that I do my best when the first thing that moves is my front knee. Basically, when I set up, a lot of my weight is on my front foot. I just relax my front thigh muscles, letting my knee move forward just a bit and flexing slightly. This is the very beginning of my movement. It results in a slight hip turn. Ideally, I strike the CB with my stick at the point where my waist has almost fully turned to face the table, and my hand is right beside my hip. Watch any of the great power breakers. You will see that the grip hand making contact when beside the hip is a recurring theme. I like to keep in my mind the concept that there is a LOT of time between when my knee first flexes and I actually pull my hand through. When I watch your video, it looks like you want to rush through that movement as fast as possible. Watch Shane break in this video (at 11:20):
http://www.youtube.com/watch?v=QtGe0FouC6A Watch how slowly he moves. The whole thing is slow and leisurely, whereas yours looks fast and jerky. I find that the slow movement not only greatly enhances control, but also keeps my power consistently high.
3) Experiment with holding the cue loosely, but at the moment of contact snap your fingers closed. Imagine that your hand is like a rubber band or something--your fingers, that is. They are soft and flexible, and the cue hangs on them like a spring. At contact, you snap your fingers closed, like you are trying to slap the cue into your palm with your fingers. This advice comes first hand from Francisco Bustamante. He showed me this for quite some time. I was doing something similar, but he helped to solidify it. His only words here were: "loose here....then TIGHT". The point here is that you can achieve considerable power with just your hand, and don't need all the lunging body movement.
Give these things a try. Let me know if any of it helps.
KMRUNOUT