“The photos are displayed after each shot on the large screen.” By setting the camera’s Image Review option to Hold, the latest photo is visible until the next photo is taken. “High-quality copies of the photos are saved onto the camera memory card for retrieval after the party.”
The housing is made from wooden panels and the mounts for the camera, monitor and arcade button are all 3D printed.
Full instructions are available here and lots more DIY projects can be found on their YouTube channel.