This is Walter Ruttmann's classic 1927 film, Berlin: Die Sinfonie der Großstadt (also called Symphony of a Great City). It is one of the first films of its type, unrivaled in greatness until Koyaanisqatsi and Baraka.
And your sound IS working - it's a silent film. There were several scores written for it later, but the original has no sound at all. I recommend you play some Philip Glass, ambient, or something minimalist if you want some noise to go with it.

Enjoy.

This film is entirely in the public domain and is free for everyone to download at http://www.archive.org/details/Berlin... .