Magna Carta was a 2|entertain documentary released on the DVD of The King's Demons. It explored the history of the Magna Carta with much of its focus being on the impact it had on today's world. The documentary's connection to Doctor Who was a loose one, though it did employ footage from The King's Demons and The Crusade.
For the purposes of this list, a "DVD documentary" is one made especially for the Classic Series DVD range. For this reason, things like studio recordings, film trims/inserts and other documentaries featured on DVD releases are not included below.