Why Windows 2003 IIS FLV Video cannot be played and resolved _win server

In fact, the reason is very simple, because most of the domestic Win2003 host. The default is to not specify output FLV this format.
Although it can be seen in FTP, but not through HTTP access, it can not be played.
Open IIS Manager Select Web site properties that's where you can set the host header.
and the Security directory HTTP header custom error service
When you see this, you choose HTTP headers.
So then you see a MIME type and then you dot type
Create a new type extension name is. The FLV type is Flv-application/octet-stream
And then determine