This new site from the TED talks folks lets you use any video you can find to enhance your lessons. Make sure to take the TED-Ed tour by clicking on the arrow at the bottom of the home screen. This site really can change the way you teach!
Use engaging videos on TED-Ed to create customized lessons. You can use, tweak, or completely redo any lesson featured on TED-Ed, or create lessons from scratch based on any video from YouTube.