But somewhere, in the shadows, or in a free land somewhere in the world, a proof-of-work blockchain lives on. It contains timestamped sha256sums of manifest files of videos, which in turn contain sha256sums of the videos. It proves that certain pieces of data existed at certain times. Once the regime falls, the authentic videos can be determined by the hashes that were published before the regime came to power.

Is anybody talking about this scenario and/or remedy? Maybe there's a less alarmist version to consider as well.