Apparently, US copyright law means that "non-human authors" do not have the right to automatic copyright of any photographs that they take. In the weird world of copyright, both an underlying image and subsequent alterations resulting in a final image are needed to have copyright bestowed on a person.
If you're reading this post (or viewing anything online for that matter), you're making on-screen and cached copies in the course of browsing the web. And if you were asked whether you were infringing copyright by making those copies, you would probably laugh (because how could the internet possibly function if that was case?).
10 years ago, Youtube was just distant thought in its founders heads. It now has over a billion users and almost 15 million videos about cats. Not only is it making cats well famous, but it is changing the way people watch film and is opening up the world of filmmaking to people who couldn't have got there before.