That video turns my stomach, I hate to see a Black Woman disrespected and humiliated by the police. This is something many yt officers enjoy. I work with many racist police and I know for a fact, the hate for educated Black Women is real.
Had I been in her situation, I'd have shown my ID because it's the law to do so. Once she decided not to abide by that law, that officer is permitted to treat her as a resisting criminal.
Think before you get angry and don't give them the upper hand because they will exploit it.