Common Craft have created a bunch of interesting explanatory videos, they say:
We’re interpreters. We present your products and services in plain English using short, unique and understandable videos in a format we call Paperworks.
Theres a few of them available in their blip.tv channel: http://thecommoncraftshow.blip.tv/, both useful and nicely presented.
Here’s ‘Wikis in plain English’
If you find it useful and good then you should check out:
Nice work Common Craft folk. I like what you have done.