Yup. If you watch lots of arrest videos, both from the funny, odd and tragic categories, its a common feature.
It may look unusual that the cops don't react to it, outrageous to people dedicated to a narrative, but in reality by any chance this cop has probably heard it many, many times, and all the previous times nothing special happened.
Overall, with the information available, including the LEO comments, it seems like a case of professional malpractice. Which is probably going to turn into a long and complicated legal case, and someone is certainly going to be punished, but in the meantime a lot of blame tennis will happen between the cops involved, the police department, whoever else was in charge of training and certifying the cops, and possibly even the city itself, to establish a certain distribution of blame, and in turn, punishments.