That would be the case if YouTube wasn't acquired by Google and totally an independent company, it would most likely be dead by now. Like other social networks and media companies, they come and go with the times.

An example of a non-media company wanting to exist for 'centuries', I guess Evernote is dreaming to join the ranks of IBM, Nintendo, etc when they still want to be a 100 year old startup. [0] I think reality says other wise.

[0] https://www.fastcompany.com/3012870/evernotes-quest-to-becom...