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Let's be honest here: content creators want to be paid for the videos. Only small creators with limited followers or with true passion on what they do would be willing to switch to peertube and stop earning money.
Someone like #thecybermentor with 10m subscribers would probably be willing, but there is no way that #hack5 (10.5M) will post on peertube.
That is why peertube will never have good content except for privacy or irreverent one.