You can get it on VHS from Amazon, and it pops up on eBay occasionally. Someone really needs to update it to DVD and/or online. Bud Greenspan produced it in 1970 for PBS, and there are bits of the actual voices along with narration by "the voice of God," Alexander Scourby, over great old film and photos. It's a classic piece of work, in keeping with the high standards of the book and audio editions.
http://www.amazon.com/The-Glory-Thei.../dp/6302295920