This is only for .mov files? Or can it be used with .wmv files?
You can only use it for quicktime files - .mov
Do you know if there a way which I can stream .wmv videos and possibly other video extensions?
Flash is capable of converting the various formats and streaming them as I understand. I could be wrong on this, but I think it will stream them for you.
According to the K-base there is no way to stream anything with dreamhost execpt quicktime files.