Great screenshots of Trump editing a tweet.

But the popularity of Mr. Dawson’s conspiracy theories illuminates the challenge YouTube faces in cleaning up misinformation. On Facebook, Twitter and other social platforms, the biggest influencers largely got famous somewhere else (politics, TV, sports) and have other vectors of accountability. But YouTube’s stars are primarily homegrown, and many feel — not entirely unreasonably — that after years of encouraging them to build their audiences with viral stunts and baseless rumor-mongering, the platform is now changing the rules on them.

-- verification technologies but for facts.

-- consistent with work (Starbird's?) that visual social media consistently played/plays a greater role that written platforms.