>the first publicly-available “videophone” service to ever exist was in Nazi Germany. From 1936 to 1940, residents of certain German cities could go down to their local post office and sit in a video-calling booth to visit with other people in similar booths in other post offices in other cities. The booth used a flying-spot scanner to generate a video image, and had an 8-inch (20cm) 150-line CRT to display the image coming from the other end, which was sent over broadband coaxial cables linking the cities – over 1000km of them at the system’s peak. https://shitposter.club/attachment/2474336