Ubisoft is trying to attract more players by using the well known celebrities. Of course it is a fake and the voices commenting the progress don't belong to the real actors but are spoken by people with nicknames like DavidAttenbro, MorganF_Da_Man, SchwarzeKiller and ChattyManAl69. But still the video is worth watching to see the co-op game.
Assassin’s Creed Unity – celebrity co-op
Assassin’s Creed Unity - celebrity co-op.