The only thing I don't get about kicking is when people talk about leg speed. I really believe it is far superior to a VHS and comparable to a private lesson - except a lot less expensive.
Leg speed is critical to a kicker of punter.
This is because kicking distance is generated primarily from the speed you can develop in your leg swing. Watch yourself on film kicking the ball. I know my foot goes above my butt before I start my leg swing. Remember, the faster you can swing your foot at the ball, the farther the ball will go. Back swing and leg speed in general can be improved in a number of ways.