Did you find a place to view that video? I haven't seen it appear anywhere. I agree - she is probably terrified of being the center of the Trump mob's attention. In this CNN report they read the statement released by the Army, supporting their employee at the event (while not mentioning Trump by name - but the meaning is clear.)

Also, a follow-up to the smear by Senator Cotton on Sunday, Biden and Harris were not invited to the event that he says they ignored.