I dare say it was completely believable for the people sitting 230 feet back from the cockpit who were thrown about like rag dolls if that video is at actual speed.
I get that the surface area of an A380 will require additional rudder input that my lowly Q400 does not, but a little care for passenger comfort and attempting to find a better method for dealing with crosswinds and gusts goes a long way. Most passengers don't mind a little more roll than normal, but boy do you hear from them if you give them any sense of feeling in yaw.