This is really pissing me off. Vegas wont accept any videos I import into it. It just reads them as audio files when they are avi. I have installed all the codecs and everything, so whats up? Woops I spelled Sony wrong. Ive pretty much confirmed that the .avi plugins arent working. OK, I think I figured it out.
There's codec packages as well that you have to addon to load some videos. You might just need keys for them. I dunno though, I havent used it since before Sony bought it and it was called Vegas Video.