With the end of the silent era, Napoleon director Abel Gance created his first talking film called 'The End of the World.' During the making of the film, Eugene Deslaw filmed a silent documentary, which includes behind the scenes images of the filming, with clips from the picture.
But the film was not a success. With funding pulled, after nearly two years in production and five million francs, the only release US version was cut to 54-minutes. Kevin Brownlow used some surviving film clips in his history of European films in Cinema Europe.
Here's more about the film from DVD Talks.