Sorry, I think you misunderstand that I’m talking about a large scale problem rather than a personal problem. Of course people can individually download videos to preserve.
Imagine losing YouTube’s videos next week. You would have effectively lost nearly two decades worth of media chronicling human and technological development (more if you take into account that YouTube has repositories of older media).
Someone described it like the Library Alexandria. In terms of density of information, I think the comparison is apt.
A good comparison that might be too old for some readers. Back in the 80s and 90s, the early internet was populated via usenet discussions. Google eventually bought this data and merged it into Google Groups. However Google Groups was disbanded. This meant that some archives can no longer be accessed because to do so requires some active component no longer in service. We have effectively lost gigantic chunks of early 90s internet history. A lot of this history was quite important in many facets of life.