Here are some sites that will allow you to download stock and public domain videos. Remember to always credit the owner or site that you get the material from. Also, follow fair use rules and guidelines discussed in class.
Use advanced search to search for file type. Once it is opened right click on the video to download it. Be specific in searches. This is a for the public site, open and public domain so use caution searching and viewing files. But there is a lot of good historic files in here.