Facebook and Hulu, while doing fine in many respects, couldn't quite hold online video viewers' interest in November as they've done before. New stats from comScore indicate that both companies failed to match past performances last month, with Facebook losing a spot on a top ten list and Hulu falling off it. To delve into the numbers: Facebook saw its unique user count fall from 47.4 million individuals in October to 42.5 million in November, which caused it to drop from fifth place to sixth in terms of attracting unique video viewers.