IME, even if you're "just" hosting a website for a car dealership and have a video showing a tour of the shop, it will end up being targeted. Misconfigured spiders hitting the video again and again and AGAIN, probably to harvest it for AI training, legitimate DDoS attacks just using videos as something efficient to cause you large bandwidth costs...

If you were to rebuild YouTube, aka not just hosting your own cat photos and videos like with a blog, but also the social element, it gets even worse. All the problems from above, plus you gotta deal with regular spammers and scammers now, plus PPV-porn spammers, PLUS all the CSAM spreaders who are constantly looking for new ways to host their shit in the clearnet.

You can't just go and run your own self-host these days, not if you are not prepared to deal with all sorts of abusive behavior yourself.