Free Video Resources
The video on these sites isn't necessarily "free" in the sense that you can do whatever you want with them. Almost all of them require attribution. Many of them use Creative Commons licenses. It's your obligation to research each resource and determine the conditions under which they will permit you to use their videos free of charge.
Never rip videos from YouTube or other online sources unless the creator specifically states otherwise. Otherwise, consider every video you find online to be copyrighted and ineligible for use.
Two methods for ripping video from websites (if downloads are not permitted): http://offliberty.com and jdownloader.
Here's how to find Creative Commons videos on Youtube: https://www.smartcopying.edu.au/open-education/creative-commons/creative-commons-information-pack-for-teachers-and-students/how-to-find-creative-commons-material-using-youtube
Other places to find Creative Commons videos:
