I get where you’re coming from, but I don’t think that’s a material difference. I would probably rephrase it as
I think most people would probably say the most definitive characteristic of a conspiracy theory is the nature of the narrative justifying the theory’s lack of acceptance, not the fact that it’s wrong (though I take that as a prerequisite) nor that it’s institutionally strong (which is optional, IMO)
I’ll be looking forward to this video on March 31st!