I trust Assange that the documents were insignificant.
I’m having a hard time understanding what you mean in your last paragraph so this next part might miss the point. But In the scenario of it being actually significant, I think everything would be posted on YouTube since that’s the site most people use and gets attention. Someone would’ve posted information on it.
I think the outlets other CNN/Fox and those types are what they are talking about when saying it’s being released on outlets with less attention. Why it goes on those news publications is probably because big outlets didn’t care about the information? So it was up to the lesser outlets to take up the information and write an article about it.
YouTube would be WikiLeaks and Vimeo would be the site the documents actually were released on in the example.
Saying something has been released to little attention is to quite literally acknowledge Assange was correct that the information was insignificant unless journalists will not pay attention to genuine government documents if they aren’t served to them on a silver platter on the biggest platform, in which case you shouldn’t be listening to those journalists to begin with.