You're right, you need to add the og: video meta-attributes, but you can specify it the way you want - it does not need to blink :)
Take a look at this: https://developers.facebook.com/docs/opengraph/creating-custom-stories#propertytypes-video . This gives you an example of what you need.
Like they also write, then also import it to add og:video:secure_url for users who use facebook on HTTPS.
For your situation, I would just point the video to the html page where you have the video, and then specify the type as text / html.
Like this example, taking from the above link:
<meta property="og:video" content="https://secure.example.com/awesome-framed.html"> <meta property="og:video:type" content="text/html">
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