Even if most of the people who maintain internet archives vanished in nuclear fire, there are so many published books on how to make 80% of the technology we have today from the ground up. It would take a while to rebuild the infrastructure we have now if it fell into decay for a decade or more but I doubt people would go even a day without getting videos if cats being assholes.

If the internet goes down at least a million people will make restoring it their highest priority, even over food.