Podcast == mp3 only ?

Just been having a discussion with the Scoble about our Video RSS feed from TechEd 2005 - Robert suggests that we shouldn't be calling these a "Podcast" because Podcasts are only for mp3 files and iPods. I disagree with this thinking, while it's true that Podcast started as a way to deliver mp3 files to iPod's the Enclosure tag within the RSS file can be used to deliver anything, wma, wmv, mp3, MPEG4 for PSP's, or whatever else - if Microsoft were to start calling this VideoCasting, or ScreenCasting, or something else, would you know what we were talking about ?

If you saw the term "Video Podcast" would you know/understand what this was ?

Let me know your thoughts on the subject.

- Mike