People dont really care where their content comes from, so long as it loads properly. But content creators dont want to migrate from the platforms they have all their followers on. If i have a decent YouTube channel that is large enough to be my primary income, I’m locked in because there is no real way to migrate all those followers over to a new platform. Nebula is the closest i think we have to a true YouTube competitor, but it’s a tiny fraction of the user base and most Nebula videos are available on YouTube for free.