flash video streaming and embedding

Users upload different types of files (images, videos, audio, docs etc) on our DAM server and perform different operations on those. We have public links for all t开发者_如何转开发hese assets to enable an access without any authentication.

We are having some problem working with flash videos uploaded on our server. Using a public link one can download and save the file alright. However when a public link is used in say a blog post, the video does not get displayed. When I try to open the same video using one of the desktop flash players it plays it fine when file is downloaded but fails to do so when pointed to a public link.

The embed code I use in a blog post is like this -

<object type="application/x-shockwave-flash" width="550" height="400" data="http://dam_server/flash/flashplayer.swf?file=url_encoded_public_url"> 
<param name="movie" value="http://dam_server/flash/flashplayer.swf?file=url_encoded_public_url" />
</object>

The relevant response headers from our server -

Server: Microsoft-IIS/6.0
Connection: close
Content-Disposition: attachment; filename="video.flv"
P3P: CP="NOI DSP COR CURa PSDa OUR NOR NAV STA"
Accept-Ranges: bytes
Content-Length: 1001503
Expires: -1
Last-Modified: Mon, 12 Sep 2011 08:29:01 GMT
ETag: "-1245634458"
Cache-Control: private
Content-Type: application/octet-stream

Probably we are setting some of the response headers with incorrect values.

The video plays alright within our system, but not in an independent page like a blog. Any ideas what might be going wrong?

p.s. I have checked many similar questions posted here but could not get required information.

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The problem wasn't with cross domain calls. The only thing I had to do was set file-type for the flash player we are using. Our public links do not have an extension. So the flash player wasn't recognizing the file type unless the file-type was specified explicitly.