I know this will be an unpopular opinion, but Youtube can delete whatever they want. It's their site. AFAIK, most people don't have legally binding contracts stating that Youtube must keep all their videos online. Even the big streamers that make money off Youtube have to follow whatever guidelines Youtube come up with. I bet there is wording that says something to the effect of "Subject to revision..." or like that in the AUP.
That said, there is nothing stopping people from creating their own sites, or putting taboo / extreme videos on chan sites, forums, etc... and plonk it down behind Cloudflare or Akamai. i.e. 4chan, 8chan, I mean, you won't find more extreme videos that what get posted there every 90 seconds. In this case, I am not linking to the examples.
That said, there is nothing stopping people from creating their own sites, or putting taboo / extreme videos on chan sites, forums, etc... and plonk it down behind Cloudflare or Akamai. i.e. 4chan, 8chan, I mean, you won't find more extreme videos that what get posted there every 90 seconds. In this case, I am not linking to the examples.