Like books, music, paintings, and photographs, video also falls into the public domain and/or copyright protection. Please be sure to check and double-check that you have the appropriate license and usage rights prior to downloading and/or using any video for any of your projects. This list will continue to expand as I find more websites offering free & paid video, so please check back often. If you know of a great website, please let me know.
Videvo & Videvo’s Stock Footage
NASA (SoundCloud) & Usage Guide