You can download the Unknown Armies videos here. The first is 38 seconds long, slightly under 1MB in size, and consists largely of cobbled-together images and a borrowed soundtrack. It's sort of a general advert for UA.
The second is 2.5MB, and is an Entropomancy-themed music video, put together using footage from a couple of films.
At the moment, they're only available in .WMV format. Requests for other formats (if you ask nicely, I could even email it direct) should be sent here
Unknown Armies promo