These three conversations were recorded at MSRI on September 13, 2013 for the production of Counting from Infinity, and parts of each are used in the documentary. These conversations with David Eisenbud, Daniel Goldston and Kannan Soundararajan contain much more detail about Yitang Zhang’s life and mathematical work than the completed one-hour film.
A conversation between Yitang Zhang and David Eisenbud: (01:36:33)