Those videos people did "for fun" also had massive exposure, because there was money coming in to pay for the servers to push those videos out.
Peertube offers neither much exposure, nor any money, so why? Why spend time making videos for a very few people who you will never meet?
I don't like capitalism or monetization, but what you want is a logical impossibility without a funding stream, and I doubt there is one that isn't problematic to some degree.
Places where independence can thrive are webpages and podcasts--both much cheaper to produce and distribute.