It's going to be interesting to see where 3speak goes. Of course there are people being denied an outlet my repressive regimes, but there are also people being shunned by the big 'mainstream' companies for spreading hate speech. Of course that is subjective, but when is racism a good thing? @andrarchy says there will be limits such as child pornography, but where do you draw the lines? There is also a difference between allowing free speech and supporting it financially.
What happens when local law enforcement comes knocking over you hosting videos that are in contempt of court? In an ideal world you can have any possible content, but you have to host these things somewhere and you are subject to the laws there. I know Steemit has had to take down stuff for DCMA. Of course it will still be on the blockchain, but the actual videos have to be hosted somewhere.