The Prelinger Archives is another great resource for those in pursuit of the Digital Humanities.  The Prelinger Archives are situated within the Internet Archive. Their terms of service are as follows.

The site itself is dedicated to archiving films. These films from being educational, industrial, amateur and commercial. The mission of the archive is to “collect, preserve, and facilitate access to films of historic significance that haven’t been collected elsewhere.” The archive has a vast collection of digitized and videotaped files. The collection includes public domain material based on the terms of the Creative Commons Public Domain license. Items in the archive are free for download and reuse.