It's long OOP however there are a couple of VHS copies on Amazon's marketplace starting @ $40
Click here to check it out
Google Video: This is a full length 1976 documentary portraying the ancient astronaut theories of Swiss-born researcher Erich von Däniken, who wrote "Chariots of the Gods" (posted elsewhere on Google Video). The film is hosted and narrated by William Shatner. Everything from the Peruvian Crystal Skull to the megalith structures in the jungles of Southeast Asia is accepted as evidence for the Ancient Astronauts theory. Cave drawings, old legends, Biblical stories and even some psychic visions of Jeane Dixon are presented as stone cold facts. Eric von Däniken's reputation was still quite unspoiled at the time so all the arguments (even the most far-fetched) are shown with great confidence.