Flash video is great. But if you're brand new to it, it can be daunting figuring out how to get it to work. It doesn't help when your web server is returning 404 errors for a file that you KNOW is there.
To solve, you have to map the .FLV extension to video/x-flv in IIS.
I don't know why MS chooses to show a 404 instead of some other access denied error. For that matter, I don't know why you can download an MPEG without doing any mapping. Some things are best left alone.
Setting up MIME types for Flash on IIS
I'm probably going to bake some chocolate chip cookies tonight, but I don't think that's worth blogging about. The recipe is on the back of the chips. The rest is left as an exercise for the reader.