Search this site for public domain videos. After searching, be sure to select the filter "Public Domain Only."
Searching Creative Commons
Use CC Search to find images and media provided by other organizations, including Flickr, Google Images, and YouTube.
When you use Creative Commons, remember that not all of the results displayed on these other websites will have Creative Commons licenses. Be sure to check each file for permissions and license information.
The Flickr image displayed above is licensed with Creative Commons, but includes a "Some rights reserved" link. Upon clicking this link, you'll see that if you use the image, you must attribute it to the author. This is just one example of the importance of checking each image, video or audio file for rights information.