Watched your video and your drive when looked at in full speed looks ok other than your body and hips don't really turn far enough back plus your arm speed seems relatively average. Now watching it in slow motion reveals a major flaw for big time distance if that's what your looking for.. Your right foot your plant foot is coming down and your arm is still going back after your plant foot comes down..in order to get max distance u need to get that arm and hips all the way back just before plant foot comes down, then as plant foot comes down your hips and arm should be coming back through together.. Everything together as fast as you can pull your arm and hips with foot planted simultaneously.. That is how big distance is achieved.. Hope this doesn't confuse you. It's easier to demonstrate than tell with words..