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.

Included in this Blu-Ray box set are a handful of new tidbits, the most intriguing of all being 14-minutes of lost animation footage with a commentary by Monty Python alum Terry Gilliam.

Monty Python and the Holy Grail 40 year anniversary: Long-lost footage of Terry Gilliam's cut animation emerges online 'Here we go again' ...