Let's face it, video is a great tool for learning. After ensuring appropriate copyrights, you may look to utilise media from YouTube, DailyMotion, Google.With http://www.keepvid.com you can easily download Youtube and other sites media contect direct to your computer.This means - offline viewing during the lesson, no distractions from all the other content on the live site. And of course it means you can store for further/future use.Happy viewing!