.flv file format returns 404 error in IIS

In IIS by default would not serve .flv videos.(would return 404 error code)
.flv MIME type has to be added to IIS Website to serve .flv videos.

Steps to Add MIME type in IIS (.flv or any other)

1) Open Internet Information Services
Start -> Run -> inetmgr
or
controlpanel -> Administrative Tools -> Internet Information Services
2)Right Click the specific site and select "Properties"
3) Click HTTP Headers Tab, select "File Types" under the MIME Map section.
4) Click "New Type" button and add ".flv" as the associated extension and "video/x-flv" as the content type.
5) Select "OK".