For one, Facebook's trying to give YouTube a run for their money. There's an entire tab in their mobile app dedicated to small bite-size videos like are watched on YouTube, and Facebook Live is all about connecting small video producers directly to their audiences. Outside of that, there are lesser known sites. Vimeo, Metacafe, Dailymotion, Twitch, Veoh. YouTube has the brand recognition, but simply hosting video online isn't that hard. It's way harder if you have to build your own colo though.

For the casual viewer, YouTube has unbeatable brand recognition, and if I was trying to build an audience for a mainstream idea, that's the obvious place. However, for dedicated fans of a specific ideology, with YouTube deplatforming that ideology, the usual considerations are fewer.

Normally, the friction associated with getting viewers to install an app would be enough to dissuade a large number of users. For users who believe the government lies and that they're seeking the truth, and only the RushLimbaughTube app can expose them to it, I don't know if there's the same friction.