'A definite threat': The fake video phenomenon taking over the internet

You might not be aware of it, but there's a quiet arms race going on over our collective reality. The fight is between those who want to subvert it and usher in a world where we no longer believe what we see on our screens and those who want to help preserve the status quo. Up until this point in time, we have largely trusted our eyes and ears when consuming audio and visual media content, but new technological systems that create something known as deepfakes, are changing that. And as these deepfake videos nudge into the mainstream, experts are increasingly worried about the ramifications it will have on the information sharing that underpins society. Dr Richard Nock is the head of machine learning at CSIRO's Data 61 and understands the daunting potential of the technology that powers deepfake videos.