I know this is three years old, but I enjoyed watching it anyways

BBC one: When Corden Met Barlow. (YouTube, 59 minutes, 1080 HD)

“A Documentary ‘When Corden Met Barlow’ aired on BBC One on May 5. The pair head off on a road trip and aim to discover the secrets of Gary’s 25-year career. Features interviews with Elton John, Robbie Williams and more.”

Also: Gary Barlow & James Corden – Pray @ Manchester Apollo. Complete with Take That dance moves.