Hi there,
I see the error message that you are referring to in your Gilgamesh videos. Could you try removing and reuploading the videos in your media library and see if that resolves the problem?
https://clementsgeoff.wordpress.com/wp-admin/upload.php?post_mime_type=video
I agree that there does not seem to be a Facebook account associated with this blog. Could you try again following the instructions at:
http://en.support.wordpress.com/publicize/#facebook-profiles-pages
Let me know if you do or don't get the final success message, and whether or not it seems to work the second try.
Thanks!