The Making of Miss Hokusai (2015)

A comprehensive behind-the-scenes piece that features raw footage from the production studios and work stations, introductions and in-depth interview clips with many of the key artists and filmmakers, an examination of the manga that inspired the film, a look through some of the key components in the filmmaking process (storyboards, adapting the manga, production meetings, and many of the steps along the way), and more, even some "life and times" highlights as the filmmakers go about their routine and work commitments. The piece plays sort of like a dramatic "reality television" program at times, but it's an absorbing look into the wonderful world of animated film creation.

Unfortunately the movie The Making of Miss Hokusai is not yet available on HBO Max.