This film is an experiment in cinematic communication of real events.
Without the help of intertitles
Without the help of a story
Without the help of theatre
This experimental work aims at creating a truly international language of cinema based on its absolute separation from the language of theatre and literature."
While it is nice that that this film is available at no charge online, I recommend getting a copy of the DVD version published by Image Entertainment. The DVD includes a commentary/essay track by Yuri Tsivian that is an important supplement to the film.
Here's a short review of this classic film from Scope film journal.