I attempted that. In videos from the last year the only things I could find were some people protesting ICE, A person accusing a mayor of sexual assault, some republican party events with protestors, and a few of people speaking out of turn being walked off by security.

Without the specific examples you described I have no idea what you are talking about. It is either sufficiently old that it could be considered an isolated incident if no more recent incidents have since occurred, or it is considerably harder to find than you imagine.