One big difference is that lbry does not federalize with the fediverse, therefore having to make an account to interact there while you can follow a peertube channel directly from here on mastodon for example.
Also the biggest creator I've seen using peertube must be Chris Were, while libry has what you said for example.
But on the otherside I've found a lot of cool creators on Peertube
A giant issue for both platforms though is that hurt your youtube stats if you are on there. But that's mostly a issue for big creators.
If you are on other platforms your core audience will probably rather watch there and have a big impact on your view and minute stats hurting your youtube reach.
So peertube is probably more viable for smaller creators who aren't slaves to youtube yetAnd peertube is greatFor discoveribilly for newer creatorsAs thereIsLess noise
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