Facebook is an online social networking service initially limited to Harvard students, but has since opened up to anyone age 13 and older. The Facebook name comes from the face book directories often given to United States university students.
facebook.com/<USERNAME>/videos/<ID>
i.e: facebook.com/hintmag/videos/10156146967085261
facebook.com/<USERNAME>/posts/<ID>
i.e: facebook.com/hintmag/posts/10156146967085261
facebook.com/video/video.php?v=<ID>
i.e: facebook.com/video/video.php?v=10156146967085261
facebook.com/video.php?v=<ID>
i.e: facebook.com/video.php?v=10156146967085261
facebook.com/photo.php?v=<ID>
i.e: facebook.com/photo.php?v=10156146967085261
facebook.com/<ID>
i.e: facebook.com/10156146967085261
Note: Only video posts are supported
facebook.com/video/embed?video_id=<ID>
i.e: facebook.com/video/embed?video_id=10156146967085261