Yes, this work with facebook video embed too. 😀
How to it work??
Here for example:
For example link your video facebook like this: https://www.facebook.com/photo.php?v=video_id_xxx
Just add iframe:
<iframe src=”http://www.facebook.com/video/embed?video_id=video_id_xxx” width=”” height=”” frameborder=”0″></iframe>
In metaboxes other source. Yes this video still responsive. 😀