This web site offers a concise and clear tutorial on how to download web videos and even burn them to a DVD using Real Player.
These instructions are most useful for Windows users, but should work on the Mac too.
Veteran educator Gary Stager, Ph.D. is co-author of Invent To Learn — Making, Tinkering, and Engineering in the Classroom, publisher at Constructing Modern Knowledge Press, and the founder of the Constructing Modern Knowledge summer institute. He led professional development in the world’s first 1:1 laptop schools thirty years ago and designed one of the oldest online graduate school programs. Gary is also the curator of The Seymour Papert archives at DailyPapert.com. Learn more about Gary here.