Heart of Darkness is an 1899 novella by Joseph Conrad about a narrated voyage up the Congo River in the Heart of Africa. It's the original story which the film Apocalypse Now, the 1979 Vietnam War epic directed by Francis Ford Coppola, is based off of.
Hearts of Darkness: A Filmmaker's Apocalypse is the 1991 American documentary film about the production of Apocalypse Now.
Filmmaking is difficult. For every project that is completed there are 10x more that begin and never finish. I don't generally have other directors on the podcast because it's hard to find any who aren't egomaniac's only concerned about their career laurels and advancement. I've known other filmmakers who have had many broken friendships due to their behavior trying to finish a project. Also another documentary filmmaker who was divorced because he secretly spent all of his and his wife's money they we're saving for purchasing a house in an attempt to try to complete his film. Those horror stories are mainly from indie ventures and don't even include all the staggering challenges of managing high budgets and dealing with studio pressure.
This documentary was initially begun by Eleanor Coppola, regarding all the problems the film's production encountered, having to recast actors after extensive shooting with them, the budget spiraling out of control, and mental and physical health issues crew members suffered from, including nearly destroying the life and career of its director and her husband, the footage of which she then turned over to a couple other filmmakers.
There are six primary types of documentaries, but the rarest are those which have exclusive once in a lifetime access to unusual and rare events. This is one of them and is very worth a watch. As it's a fascinating exposé on the difficulties of complex filmmaking.
It used to be very hard to find. I remember paying the most amount I ever had for a VHS copy of it in the late 90's. Today, it is easily finable on streaming platforms such as Amazon or YouTube rental.