But that was already true with words alone. Lives are already ruined every day by baseless claims with zero evidence, no video required. People who already research the source of words before forming an opinion will now research the source of videos, too. Those who are fooled by written and spoken lies will also be fooled by animated ones.
Words have almost no impact compared to visual imagery. Even if the words come from the mouth or pen of a respected individual, you can still doubt it, and usually people do.
However, whether we like it or not, everything we see, at least on a subsconscious level, we perceive as real.
My assumption would be that we have no evolutionary resistance to that. I don't know if there can be at all. People have been lying from our fist day of existence, but up until very recent times, there has never existed anything in nature that can create arbitrary images that look 100% real.
It doesn't matter if it's fake or not, if you see a convincing version of your president fucking a pig, you'll never forget about it, and you'll always attach that image to him. Similarly, people often can't differentiate between an actors character and the real person. Whether it's Macron on his campaign film or Gandalf on lotr, you associate that person with your simulated experience.
Animated lies are on a completely different tier of immersiveness and deception than speech or writing. You can't reduce this development to "just another lie". It's very close to the most convincing lies possible, and it's definitely very dangerous.
In addition to this, despite all our cutting edge forensics, we still fumble the ball in the courts, based on sham forensics, and send innocent people to jail.