The thing that is suspicious to me is a ship this size should have emergency lights lit and nav lights lit when main generator power goes down. It is required to have emergency lights. In the videos all lights shut off. As if someone flipped off power to the emergency buss. There should have been some lighting and Nav lights visible running on the emergency power system. Which would include an automaticlly started backup Generator but also a battery bank for emergency lighting sized to power those lights for several hours.
It could have all been incompetence too.