Demo of a Digital Computer from 1942
It wasn’t programmable but the Atanasoff–Berry Computer (ABC) was one of the first digital computers ever created. Sadly the research surrounding it ended with World War II (the machine dates to 1942), but the computer designed by John Vincent Atanasoff and Clifford Berry got its due in 1973 when they awarded patents for their work which pre-dated the ENIAC. This video from 1999 shows a demo of a reconstruction project which cost over $360,000 to create.
