I found this video from Common craft via Nancy White's blog. It's explaining what RSS is and what RSS readers can do to make you faster in keeping up with your favourite websites and blogs. It's really simple and good, and can be used for training and introductory purposes. I'm happy to crosspost it because I also liked the refreshing way the video was made. Instead of using a computer screen, print outs and drawings were used. The vingers make it lively. It's a nice way of making an instruction video without having to show up with your own face (something I like to avoidO. It's a good habit to point to the code of the video in your blogpost for crossposting too (since I have an account on blip.tv, it was clicking a matter of clicking on share, my blogname was already known to blip.tv and within two seconds I could repost it).
Common craft explains: There are two types of Internet users, those that use RSS and those that don't. This video is for the people who could save time using RSS, but don't know where to start. They intend to make a commoncraft show so there's more coming and I'm going to subscribe to it.