> the channels with the most followers have the loudest voice
Sure, but I don't people people are entitled to have their videos promoted for them. The fact that you can have your video hosted for free, and share it to anyone in the world is already great enough. While on average louder voices get the most attention, plenty of smaller creators have managed to get important messages out.
> drowing in shills and scammers
That seems like a hyperbole? Do you honestly feel this way browsing Youtube or Twitter? I'm not saying they don't exist but they're fairly rare in my experience.
> more community centric model
I agree, reddit's model works kinda well. Youtube has tried that in the past (though I guess they got rid of it?), and Twitter is experimenting with it now (Birdwatch). I also like the Facebook supreme court model for handling edge cases.