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You should absolutely download your favourite youtube videos
(criminallyvulgar.dev)
This is a most excellent place for technology news and articles.
It's silly how "the internet remembers" saying gets repeated. That was true pre-2010 roughly. These days it's evidently not that difficult for someone to be disappeared or disappear themselves from the internet.
Unless you're high profile enough or you've really angered a crowd. Nobody is going to be archiving you. Certainly nobody is dedicated enough to ensure that your content is perpetually hosted somewhere.
There are some Youtubers from the 2010 era who I used to watch. It's as if they never existed. They made their ad money and vanished.