Some of us have been through this sort of thing before. At the end of the day, it's a normal and predictable result of using a corporate/walled garden website. The great news is that there is a shift for many toward alternatives in the fediverse. Not to say that content loss is never going to be an issue again, but since everything is open-ended, it should be a bit more resilient to various "business decisions" that can cause it to be lost.
I hope it motivates many to become web archivists. If anybody is able to financially invest in digital storage, I encourage them to join up at !datahoarder@lemmy.ml and keep copies of all the good stuff you find, including YouTube channels!
I think that when it comes to video content, that is generally the most difficult to store and distribute. Peertube exists and the fediverse equivalent for free as in freedom and beer content, however creators who want to monetize their content are also finding paths that they are in control of which is also great. By that I mean services like Nebula and CuriosityHub. Paywalls aren't so bad if everyone behind it is putting out premium level content (although I do have some bones to pick with those services in their existing state).