There are a few programs that I know of that do this. Have you considered the Authntk Video WalkAround app? It is great for shooting emails of vehicles to customers embedded in a custom dealership branded template that they create for you.
Walkaround Videos :: Personalize car-buying with video emails
CoVideo does similar work but is a lot more expensive. I have also played around with Eyejot
Eyejot - Video Mail In A Blink which is a desktop video email solution. The one issue with all of them, and not really a big one, is the email does not become a part of the customer record in the CRM since they are sent from an outside client. Hope this helps.