Are you able to get HTML code from Facebook? I do not know myself, I have never used Facebook.
Alternately, can you even get a URL for the video itself? If all else fails you should be able to generate your own embed code with that.
"The devil I'll bring you," answered Hagen. "I have enough to carry with my shield and breastplate; my helm is bright, the sword is in my hand, therefore I bring you naught."