Thanks to Anthony St. Jean last night I learned that Pixabay hosts public domain videos that you can download for free. It’s an option that is right on the front page of Pixabay and I’ve just overlooked it. To find public domain videos on Pixabay just select the “video” option from the menu on the homepage. The videos that you find through Pixabay can be downloaded as MP4 files in standard or high resolution.
On a related note, visit Dig CC Mixter if you need music for a video project. And take a look at these options for free images to use in your multimedia projects.