First, I think as a reporter you report on facts and put out the story regardless if it isn’t popular or sexy or interesting because it’s just what journalist do unlike let’s say a tabloid writer that only deals with hot stories. I don’t think the fact it won’t change the opinion of many of the people should really be a factor.
Second, I think there are still a lot of people that don’t believe it but may think a certain detail is true that may not be. Also, there are people like my dad that voted for Trump but isn’t part of his base and will get some news from Fox News or Facebook that isn’t factual but they don’t realize it. My dad and I will occasionally discuss politics and then he will throw out a fake propaganda story he thought was true and I will pull out my iPad and show him the actual facts and how certain things are being spun out of context to draw an incorrect conclusion.

It’s worth doing a video debunking point by point these conspiracies because while it may not change the mind of the crazy infowar viewer, there are still a lot of people that may not be big into politics and only heard about events in passing or a shared Facebook post and are believing in the conspiracy only because that’s all they heard about it and didn’t take the time to dig further.