Yeah but operating a service like YouTube is such a money pit (given on recent HN threads I've read). It seems like they've been mostly able to work because of their huge ad network, targeting, etc.
1) Hosting space/cpu/bandwidth. Video is one of the most intense data jobs out there, behind I suppose maybe AI and Big Data (if anyone is still doing that). You need Terabytes of drive space, petabytes of traffic, all the CDNs, processors capable of encoding inefficient video uploads to efficient video downloads.
2) Network effect. People need to actually want to come, so that people come.
3) Paying for all this - People don't like donating, don't like paying, but hard drives/servers/power banks are not free. So you either charge premiums or use ads.
I wish more people had been willing to pay for Youtube Pro, e.g. (I still do), they're (still) getting worse because the ad-supported version(s) are still the bulk of their income. And so the ad-supported version is messing up everything, being very aggressive, etc. You/I pay for Netflix, why wouldn't you pay for Youtube?
You can't influence the dynamic with capitalism at all when something is free. Sure, companies can "en-shittify", but at least for video this is fairly simple - when it costs too much/works too terribly on one video platform, you can move to the next one. 1) and 2) Make it harder to start a new paid platform, but not impossible - you can directly reflect the costs to your users. YT is just a black box at present...but would have been less so if Youtube Pro had been more popular (ads might have been easier to block, even).