Soul: Jamie Foxx, Tina Fey and crew of Pixar’s new film on Disney+ talk about its black lead character and poignant message

• Soul is the first Pixar movie to feature a person of colour as the lead character, which ‘grew naturally out of the story’, director Pete Docter says
• The film, also coming to some cinemas, is ‘exactly what I am now going through’, Foxx says, after his younger sister, who had Down’s syndrome, died this year