FLV is a well known file format, but IIS6 doesn’t support natively.
You get a HTTP404 error even if file is really there.
You must explicitly enable it, via IIS Manager.
If you have IIS6 then read this post: How to enable FLV file playback in IIS 6
On Windows7, FLV is already enabled so you don’t have to change IIS7 settings, except if you to disable FLV
Run IIS Manager, from Control Panel\Adminstrative Tools, select main node (your host), then icon Request Filter in IIS section (middle of the page) …
… right-click “Deny File Name Extension…”
… fill in “FLV” or the file extension desidered then you get list updated
Now, FLV is HTTP404 Not Found.
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