That was no nip, if you look at still taken from the video, the dog had his mouth WIDE open. If the dog had connected fully, which was very possible with that kind of full on bite, he perhaps may just have gone mental when hearing the screams.
There are lots of what if's, what might, what caused etc....but at the end of the day that dog produced an unprovoked attack on a human. No warning, no nip, an actual bite.
The people who are giving the dog an 'excuse' for biting are just as guilty of anthropomorpism as the anti's they so despise
Your right Moll, but the dog never asked to be ther