Researchers from Stanford University and the University of Erlangen-Nuremberg have worked with the Max Planck Institute for Informatics to create face-warping technology. Using a clever bit of kit, the team can manipulate the faces of people on YouTube in real-time.
The tech in question renders the "target actor" (in this case, Bush, Putin, Trump and Obama) with neutral expressions. They then have a "source actor" make their own expressions. These expressions are captured via webcam and blended with the target actor's face to convincing effect.
It's unknown whether this technology will be available to the rest of us anytime soon, and what sort of good-natured japes we'll be able to get out of it. All we know is having someone change your face from another place at a real-time pace is pretty ace.