Crazy how well *nix did back in '05, now that there are so many quality of life improvements, the near takeover of the web platform for most apps, M365 existing, Wine compatibility improvements, and the ease of management for virtuals & rdp/vnc when something must be on Windows, most of their concerns have hopefully been eliminated.
It'd be interesting to see if there have been recent followups.
You have to remember that YouTube has 20 years of content and is ran by an advertising agency that also specializes in search algorithms, and they make money by having ads watched along videos that retain attention enough to motivate people to watch another one (usually meaning quality videos, though algo slop is also a consequence). PeerTube is a little over 6 years old, is almost entirely operated by volunteers and donations, and the whole fedi, including PeerTube, is only near .0001% of youtube's user base. While the community is improving at a rapid rate, near every topic outside of the fediverse itself simply is by YouTube standards still niche, especially if you only watch in English.
Searching curated instances like https://fedi.video/ is probably the best we have right now if you don't want to sift for gold yourself, outside of requesting more creators (preferably those you're patreoning) to join or at least allow reposting.