this isn’t true (anymore, at least.)
i just used compressor to make a vp8.
you need to install it as a quicktime component and it will show up under the quicktime codecs as vp8
https://code.google.com/p/webm/downloads/list
(WebM Component Installer.pkg)
also check out Miro Video Converter. (donationware.)
my problem is any option i’m finding is horribly slow!
anyone know of speedier solutions?