content: Yep.  Like him or hate him, he is still the single biggest name on YouTube, and has a lot of friends with a similar level of status on the site.  If he wants to, he could easily organize a multi-million strong protest against Twitter with just a video or two on his channel and some messages to his friends. Good luck censoring this incident (and the hashtag that it will inevitably rally around) when the majority of the site is being filled with it.