> If enough people who see it "like" it, it moves to a larger amount of people, and so on until everyone on the app sees it. This is easy, straightforward, and transparent (for the most part, there are special cases and such).

This is the problem of any platform.

What happens when the platform gets so big that you have thousands of videos competing for the same feed position because they are all getting likes?

I see the same thing happening with the dev.to platform. I used to syndicate my blog posts there. I got something like 7,000 followers in a few months while posting a few articles I picked from my site. They got thousands (10k+ on some of them) of views and every article I posted got tweeted from their main account which then got RT'd sometimes hundreds of times, etc..

But for the last few months not 1 of my articles have gotten tweeted and the posts have like 100 views (but have thousands of views on my own site).

So it's the same pattern. It's just a platform getting large enough where unless you get special treatment it's nearly impossible to be visible. In my case I'm probably not going to re-post on dev.to anymore because it's not worth the hassle to manually port those articles to their platform (which takes time).