I can understand why she would be embarrassed by the video, but I do not believe she had any expectation of privacy.
Her actions were juvenile. She went to a conservative event with the intention of disrupting her because she is did not agree with the ideas being expressed. That is juvenile in itself. Then she cursed and threw a temper tantrum.
I can understand that you wouldn't want that video in the public because she looks like a fool, but she made herself look like a fool.
Its like a guy who separates from his wife because he cheated on her then sues her for telling her friends that they separated because he cheated on her. If he didn't want people thinking of him as a cheater he shouldn't have cheated. Likewise, if this woman did not want people to think of her as a child, she shouldn't have acted like a child.