What if 4 people watch the video together on one phone? Do you include this in your social media eng

Just thinking...we usually focus on unique viewers, but what about the 'extra viewer'? Extra or supportive viewers who watch a video together with friends or share it with others can be highly engaged. Their engagement goes beyond just viewing the content; they are actively involved in sharing and discussing it, which can have a significant impact on the video's reach and engagement. Do you measure it? How?