“Monty Python and the Holy Grail,” which turns 40 this year, has been watched countless times, but there’s some good news for fans. You haven’t seen everything just yet.

Celebrate the 40th anniversary of "Monty Python and the Holy Grail" with this 14-minute video of previously unseen animations by Terry Gilliam, who also explains the inspiration behind his work.

Fourteen minutes of previously-unseen animation from Monty Python and the Holy Grail has been released on Monty Python's official YouTube channel. Monty Python's artist and animator, Terry Gilliam ...