Censorship by private parties is only a problem when they are allowed to be a monopoly in that market segment. If we had hundreds of viable and independent youtube sites and hundreds of viable and independent social networks around the world private censorship wouldn't be much of a problem at all, you just take your junk to whoever accepts it, be it from a jurisdiction point o view or from a policy point of view. If none of them accepts you, you likely need to spend a long time reflecting upon yourself... or try creating your own service (which has a much bigger chance of staying afloat on such fair market) that accepts your junk.