Over on Tame the Web, Mick Jacobsen describes how he decided to produce his screencasts not from the librarian point of view, but from the Patron Point of View (PPOV).
Which video do you think would be viewed more: Learn How to Search LegalForms or Find a Customizable Contract for Your Business? I think the latter. The shift from a sage on the stage librarian teaching databases to the PPOV has changed everything in regards to my idea of screencasting. Try it, I think you will find it liberating.