Kusanku Kata in sections to help you more easily learn the form. After you are performing this section to your satisfaction, you can go to the next in sequence; so on and so on until you have the whole kata down in memory. This method eliminates the time wasted in searching for the spot you need in order to refresh your memory.
Once you have Part 1 memorized and performed correctly, move on to this video of Kusanku Part 2.
The final wrap-up! Now! Perfect your performance of it and you are a Kata Dancer. Learn the CORRECT applications it encompasses from your instructor. That's the ONLY way!