The SKU has produced a collection of 3 Kata DVDs which are an ideal reference and training aid.
Sensei Stan Knighton 9th Dan demonstrates Katas from front and rear angles at both slow and normal speeds. There is also a bunkai application section for every Kata.
Volume 1 covers beginner to intermediate training and volumes 2 and 3 cover intermediate to advanced training.
You can purchase the DVD here