[munificent]

I think we'll solve it the same way we solved similar transitions when text and image faking became easy: provenance.

For many years now, most have understood that you can't take text and images as truth because they can easily be simulated or modified. In other words, the media itself is not self-verifying. Instead, we rely on knowing where a piece of media came from, and we associate truth value with those institutions. (Of course, people disagree on which institutions to trust, but that's a separate issue.)

[kbenson]

In other words, the same way we dealt with information before photographs and videos were invented. The answer to how to we deal with the fact that images and videos can't be trusted is to look at what we did before we relied on them. If we're smart about it we'll try to pick out the good things that worked and try to build in safeguards (as much as possible) against the things that didn't, but I won't hold my breath. We're already heading back towards some of the more problematic behavior, such as popularity or celebrity equating to trust.