A Message from Akira Kurosawa: For Beautiful Movies (2000)

A revealing look at the Japanese auteur's working method using structured chapters that focus on one aspect of the craft at a time. It was shot by his son Hisao and features input from Akira's daughter Kazuko. It's a kind of 'make films the Kurosawa way' class that'll give you a deeper appreciation of the lengths his cast and crew went to in order to realise the vision.
Of special interest to me was seeing some of the stunning storyboards that he reportedly spent a decade painting in preparation for Ran (1985). If they're not already collected together in a book, they ought to be.

3½ shades of emotion out of 5