Part of the scandal around Somerton is that he was plagiarising, the other part was that he (and his assistants) were drawing their own conclusions from insufficient and scant evidence and presenting them as fact. As far as I know he is rare in the former, or at least the extent of the former, but the latter is a pretty big problem on YouTube and the internet in general. A lot of "1+1+we can assume the 3 are all somewhere, so 5" type thinking, and I'm not just talking about conspiracy theorists or similar.