I agree completely. I suspect she was being intentionally provocative/irritating as the police were doing something at least a little tense (inference based on the body armor and her constant talking/yelling, plus the video centering on her rather than on the main police action). I also agree that the police were stupid to have obliged her by behaving badly on cue.
I suspect that the police officers set themselves up and fully deserve what they are getting. I suspect that the officers in question addressed the public in an uncivil manner and then threw a snit fit here when their attitude was mirrored back at them.
They are civil servants. If their behavior towards their employers (the public) is uncivil, then they have no expectation of respectful treatment by the public. Even if they and their defenders are too damned stupid to understand the concept of reciprocity.