My friend brought an Insignia HD camera (low-end, but still HD) yesterday and we shot some test with it along with my Canon ZR-85. But when I tried to open the AVIs in Vegas, only the audio part showed up. Is there an import option I'm missing?
This usually indicates that the video codec that this camera uses is not installed on your system or not supported by Vegas. If the camera came with any software on CD I would install it. It probably contains the needed codec.
You probably need a codec or you need to convert the footage to something else. As far as I can see it is probably some kind of DivX / MP4 that Vegas cannot decode as default.