You can choose to retain a lawyer if you wish to be represented or you can represent yourself. The choice is yours. The hearing will be an administrative hearing and not a formal court hearing.
The rules of evidence do not apply at this hearing, so you or whoever represents you, will not make any formal legal objections. The hearing officer will simply watch the video, listen to what the person charged wants to say, listen to any additional witnesses, and make a finding based on what was presented. The decision to retain a lawyer is up to you.