That seems like an unnecessary limitation on the term. But even still, coordinating the timely creation and distribution of YouTube videos and fake-news stories (as occurred in the 2016 POTUS election cycle) might well have qualified.
Neither the sincerity nor the ubiquity of your beliefs concerning ‘the MSM and disinformation’ is evidence that it is correct. As I have pointed out before, discrediting the MSM has been a central component of the conservative long-game for about 30 years now. (Ironically enough, this component amounts to a disinformation campaign in and of itself.)
I challenge your facts. And in that regard, I would point out (again) that, by definition, fake-news outlets do not issue corrections and/or retractions. So any outlet that does issue them is not engaging in ‘fake news.’