When you try to grab embed code for your video you will have the option to choose a Facebook Instant Articles embed.
For more information about Facebook Instant Articles please read this Facebook entry here - https://developers.facebook.com/docs/instant-articles
We also highly suggest you start with their quickstart guide located here - https://developers.facebook.com/docs/instant-articles/quickstart
Once you site(s) are approved by the Facebook team for Instant Articles, you are ready to use our special Facebook Instant Articles embed code.
This embed code is supposed to be used on your Facebook Instant Article pages ONLY. Do not use it on normal web pages open to the public.