This will be a controversial statement here, but for better or worse, Youtube is a modern Library of Alexandria. It archives a significant amount of human knowledge and culture in video form, and for a lot of it, there is no backup.
Big, popular channels do push their viewers to alternative platforms like Patreon because of Youtube's censorship guidelines and arbitrary demonetization, but a lot of valuable content is on smaller channels where the owners may not have the wherewithal to transfer all of their content, much less their audience.
YouTube is very mixed.
Putting short form content on it was a mistake.
It’s only not trash if you use it correctly.
Watch some videos by some racists, you get fed videos making you racist.
It has all the negatives of social media.
Ideal the UK would just make platforms responsible as publishers.
This is the dividing line which should apply for under 18s.