This is like deja vu all over again. We are revisiting how to download YouTube for use in the classroom. Here is a video showing two ways. One is with KeepVid and the other is using YouTube Downloader. Check them both out. I am quickly becoming a fan of the latter, but have used KeepVid for the past two years. A shout out to Paul for bringing YouTube Downloader to my attention.
Of course we know that we are "supposed" to ask permission from the video's owner and that YouTube doesn't really like people to download videos from their site. But, hey anything is good under the banner of educating our youth. Especially when we are reselling the videos or making a profit from it. :)