That's not really what he's talking about.

Look at something like KiwiFarms. Weather or not you like them is irrelevant to the insanity they put up with. The site has to be self hosted, they need their own ddos mitigation tools, I believe there aren't many payment processors that will touch them, they have their own privately paid for IP range, etc. The lefties have gone full "YOU CAN'T SAY THAT" against them and Null, fuck I think Null had to move countries because they were so violently vitriolic toward him. Recently those lefties forced CloudFlare to drop them, the internet archives are being hounded to not archive their site. I think they've even had trouble getting legal representation, or some sort of thing like that.

When your side is getting people pushed off of the internet for what they say, that side doesn't believe in freedom of speech. They believe in freedom of the right speech.

There are tons of examples of this type of shit too. I've never seen anyone on the left so thoroughly forced off the internet.

What I wonder, why hasn't the Right been able to set up their own platform yet?

Because any time they start doing well they are removed from things like payment processors. Or because it's hard to get people to switch platforms, even if the major ones are hateful toward you. It comes down to content amount, and the amount of services that are generally required to run a major web platform, many of which will bow to the lefts particular brand of currently appealing hate mob.