Answered By: Katie Hutchison Last Updated: Aug 08, 2016 Views: 4695
YouTube videos are copyrighted to the person who created and then uploaded them onto YouTube. You can link to another person's YouTube video, but you should never re-upload it or claim it is your own. Some YouTube videos can contain copyrighted materials (such as a clip from a television show) and those who upload this sort of media can get into trouble.
Using a flipped YouTube video in TedEd is totally safe because it links to the original video.