Wheel bearing makes a noise as if two pieces of metal are rubbing against each other without lube. Doesnt seem to be present in the vid, but hard to tell via a video!! Its not real life!!
Its hard to diagnose a prob over the net as you know, nothing could be wrong with his top mount but from the vid it sounds suspension related because as the car is moving and bouncing around the noise is present, indicating a suspension prob. Top mounts are first to go due to old age, shocks just normally pop, and the bush at the end normally wears away. Any of these can be the problem if the suspension hasnt been changed since the car was new.