“Inside Out 2” is the highest-grossing animated film of all time. It is now available on digital and on 4K Ultra HD, Blu-ray and DVD, and will begin streaming on Disney+ starting Sept. 25.

For “Inside Out 2,” Mann assembled an advisory group of teenage girls ages 13 to 16 to give their thoughts on every version of the film. While Mann imagined having to really sell Pixar on it ...