I put together a short screencast to explain the three best ways I have discovered (over the past four years) to leverage video email.
Advanced video emailers may also want to use videos as success actions to web forms. The bland “thank you for filling-out my web form… check your inbox and be sure to double optin” web form success pages do little to help you build your business and personal brand; whereas, setting your web form thank you page to a video does!