Common Craft produces great simple videos to help make complex ideas easier to understand. One of the questions I get when I talk about podcasting, new media, and delivering information over the internet is "What is RSS?". One of the great things about the internet is that this question has already been asked millions of time and many people have answered it! Common Craft's answer is by far the best because its simple, its visual, and its entertaining!
RSS in Plain English video. About 5 min in length (Its entertaining so it will only seem like a minute:).