Secrets of the Titanic

Secrets of the Titanic is a documentary, made and filmed over 1985, 1986, and 1987. Produced by the National Geographic Society, it was a National Geographic Video exclusive, narrated by Martin Sheen, written and produced by Nicolas Noxon consisting of historical photos and footage of the massive steamer being built and launched, the discovery and exploration by Dr. Robert Ballard, and a look inside the wreck, not only the ship itself, but the human story and sinking theories. At a cost of $19.95, the video release sold 30,000 copies by March 1998.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.