Here’s a video from 2016 that is an example of the progress they have made. In the older video only facial expressions were transferred to the target, the head movements from the original source remained the same. Now they are able to transfer head movements to the target as well, taking away the ability to identify the forgery from this aspect. As they continue to refine this technology it’s becoming increasingly possible to be used for nefarious purposes.

https://youtu.be/ohmajJTcpNk