A set of, clearly, homemade videos I recorded operating
the custom design of Fujinet device for Apple II computers,
FujiNet is a multi-peripheral emulator and WiFi network device for vintage computers.
Available for Atari 8 bits, Coleco Adam and Apple II
A video using the device in an Apple IIc:
Another video, in this case using the device in an Apple IIgs:
These devices are under manufacturing,
available at sales thread: