First, urge everyone to keep their cameras on. In most meetings, maintaining visual contact is the norm. But if this is not the practice, urge the moderator or your colleagues to keep their cameras on. Body language and facial gestures play a big role in persuasion. Seeing others allows you to "read" your audience. Strong body language and eye contact on your part will strengthen your pitch.
Evidence suggests that watching debates has no impact on opinions whatsoever. A study tracking 100,000 respondents found no evidence that debates helped voters make up their minds.