There are several online repositories for teaching and learning videos. Here are a few. If you know of others please let me know and I'll add them to this list.

Watch Know Learn
Search for a video and this site will look for it in TeacherTube, SchoolTube, YouTube, Vimeo and more. Kind of like One-Stop shopping!


KHAN Academy
Math, Science, Humanities & Others, and Test Prep are the categories of videos that can be found at the Khan Academy. Many teachers are using videos from Khan Academy in their 'flipped classrooms.'


Teaching Channel
This site is a video showcase of inspiring and effective teaching practices in America's schools.