How to Taekwondo Jump Spin Hook Kick
Tutorial on Van Damme's 360 Jump Spin Kick, commonly known as the helicopter kick or 360 Split
Dynamic Flexibility Tutorial
Some quick and effective Taekwondo/Kickboxing exercises to help improve your dynamic flexibility and give you higher kicks.
Martial Arts Stretching - Aaron Gassor, a 2nd Degree Black Belt in Taekwondo) takes you through some basic stretches and shows how you can progress from the basics to get the increased flexibility for higher kicks like the side kick, Turning kick (Roundhouse Kick) and hook kick.
For motivation - Jean Claude Van Damme Kicks Compilation