I looked at these videos with very mixed emotions. On the one hand, I marveled at how far we've gotten. In a few years we went from generating sort of okay images in a very confined domain and essentially uncontrollable, to generating high resolution video that on first glance looks real.
But then the sadness struck me. I think we're entering the post-truth era, where the truth is harder and harder to find because all the fake stuff looks so real. We can generate text, images, sound, and now also video of whatever we want in the blink of an eye. Combine this with the tendency of people to accept any "information" that fits their view, and the filter bubbles that already exist, and we can see that humanity will start living in separate bubbles. Every bubble will have their own truth, and even if someone proves that a video or image is fake, that information will probably not even reach them because the truth doesn't generate enough clicks.
I want to stay optimistic, we've overcome so much stuff as a species, maybe we'll right the ship at some point. But with all the shit that is already going on in the world, the last thing we need is the ability to fake videos like this in no time at all. At some point the separate filter bubbles will tear our stable western world as we knew it apart, and we'll see shit like WW II again. The situation is already heating up.