http://www.longtailvideo.com/support/blog/19150/publish-your-videos-to-facebook-with-a-jw-player
Here is an example of the og: tags on a shared link, so that facebook can display the client video player:
<meta property="og:type" content="movie" />
<meta property="og:video:height" content="260" />
<meta property="og:video:width" content="420" />
<meta property="og:video:type" content="application/x-shockwave-flash" />
<meta property="og:title" content="Big Buck Bunny" />
<meta property="og:description" content="Big Buck Bunny is a short animated film by the Blender Institute, part of the Blender Foundation." />
<meta property="og:image" content="http://www.example.com/bunny.png" />
<meta property="og:video" content="http://www.example.com/jwplayer/player.swf?file=http%3A%2F%2Fwww.example.com%2Fbunny.flv&autostart=true" />
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