... it turns out it's LiveLeak. They have to be one of the largest competitors to YouTube.
According to their Wikipedia page
"LiveLeak holds to being strictly non-biased in its approach to members and their content, believing in freedom of speech within the site rules regardless of how certain content might offend them personally."
This is good fucking news if you're a YouTuber looking for a free speech alternative. Vid.me and sites like it are way too small to be a serious competitor to YouTube. LiveLeak seem to have the infrastructure, the views.
Up until this point, I thought LiveLeak was just a good site for gore.