My rules, if I had been running the debate:
- Turn off the mic of the person who is not supposed to be talking.
- After the respondent’s time is up, turn off that person’s mic.
- If the respondent did not answer the question that was asked, point that out and if time remains allow them to continue.
- Don’t allow the respondent to deny reality. Lead the question with the video showing what was actually said and require them to respond to that.
Debates that devolve into verbal free-for-alls have zero value.