Anti-polyamory propoganda which clearly had some thought put into constructing a persuasive argument

Well, given how ridiculously niche polyamory actually is in the real world, maybe we should be thinking of this as pro-polyamory propoganda instead. Or rather, I think this video is using polyamory as a stand-in/steelman for mere casual relationships with no formalized boundaries, which is what actually tends to happen IRL. But then most polyamorists would agree that these are generally a bad idea.