Well most of YouTube I can easily do without, but there are a lot of good demonstrations of crafts and repairs on there that are way easier to understand than a text explanation of the same thing. If "indefinite" means "it may be that society's ability to send you stuff and fix what you have goes away for a while", I would want an archive of a lot of that. But it's <1% of the YT content, so I'm not sure if there's a good way to filter for just that.