How to avoid recording of the avatar of a only audio participant

Is there a way to avoid recording videos (an avatar) of users who are connected in audio only mode?
I would like to record a seminar where only the moderator broadcast video and audio, and the other participants are connected in audio only mode, just to make questions to the moderator.
When a participant (not the moderator) speaks, Jibri record his voice and the flashing avatar of the partecipant.

You could hide the filmstrip so no participant other than the presenter is displayed. You can accomplish this by using the follow me feature, hiding the filmstrip with the little arrow at the bottom right and pinning the presenter. Jibri will follow.