In both scenarios the decoy had not done anything that would warrant an attack by the dog. In the coffee shop scenario the decoy simply placed his hand on the handler and not in a threatening way.
And the "carjacking" video was mislabeled. To be a carjacking victim one needs to be IN the car while it is being stolen. In this scenario the handler and dog come to their vehicle and find a man tinkering with it from the outside. And what did the handler do? Send the dog!
Neither of these scenarios were done well. If these had been videos of real life incidents the handler would be in jail, broke and the dog destroyed.
On another note In the coffee shop scenario the dog is obviously ready and waiting to bite. I think a more convincing video would be of a dog happily asleep in its handler's home one lazy afternoon. This tranquil slumber is suddenly broken by a big, loud and violent man coming through the door and beating the snot out of the dog's handler. When that dog, who just moments before was asleep and had no cluse what was about to transpire, comes in hard and bites and fights hard, then THAT is impressive.