It's not like any specific platform created celebrities. People making this kind of content with these kinds of followings existed before. Someone like Bob Vila was the Jeff Geerling of 40 years ago. The difference is then you needed to win the blessing of a television studio. Today, you need to win the lottery of dumb luck to go viral and you still need the blessing of whatever opaque algorithms YouTube uses to surface specific videos. For whatever reason, people with channels feel like they're more likely to do that compared to getting their own television show, presumably because it's at least easier to publish something nobody will watch rather than trying to pirate broadcast your own stream on airwaves you don't have a license for.
What are YouTube's network effects? Discoverability and deliverability.
You can overcome the deliverability challenge with a CDN of your choosing.
The discoverability issue can be worked out by good SEO and POSSE[0] principles.
Yeah, it's not the same, but you own your media. Freedom costs money.
You can't/Don't want to pay? be subjected to Google.
This is still a free world. Free as in freedom, just not free as in free beer.
--
Oh wait! Google!
Well surely as an independent search engine with no desire to exhibit anti-trust practices, they do spend as much time developing algos for scraping for independent video.
And as a search engine, working with webmasters to provide easy scraping of metadata, and better integration into their search results.
And ranking it higher than youtube when sensible.
Right?