Those have taken much more time to produce. Now it will take just a few seconds.
The fear of fake videos is overblown. What amounts to a screenshot of a headline can get 30k upvotes and comments on Reddit without anyone asking for a source. That tendency is what worries me, not the medium.
I can imagine a world where false tweets/videos/headlines are generated specifically for you to keep engagement levels high. The outcome would be not only do we not know the truth, but no one can agree on the truth. It’s something that currently exists in our society, but technology can make the split bigger.
Those are much less sophisticated than the sorts of stuff this enables.
Pointing out a qualitative similarity does not mean quantitative differences don't exist, and quantitative differences sometimes create qualitative differences as emergent properties on a higher level, e.g. that of society. Denying this truth (and downvoting me for saying so) is idiotic.