So here is the full Imaginging Zootopia documentary.
Interest things I learned:
* John Lasseter basically admits to being a closet furry * The director, Byron Howard, is gay * The whole movie was originally about predators being forced to wear shock collars. This was changed at the suggestion of the Pixar folks. * The movie was originally centered on Nick, but the plot got darker and darker the more they explored his backstory. So they changed the main character to Judy, whom the audience found more understandable.
Basically, anyone who enjoyed the movie should watch this documentary.