Roughly translated, the Spanish lyrics heard during the hand-crank 78 RPM record player sequence have the singer forever remembering the day he brought darkness to the world.
Many of the functioning "real" equipment--with old-school names like Heathkit, Triplett, and Remington--dates back to the 1940s.
While this production is categorized as a silent film (and has won awards as such), the story probably wouldn't exist without the extensive sound mix.
All this film's steampunk/futuristic gadgets were handmade from used parts. A random list includes a GY6 scooter carburetor, a solar car battery charger, standard-def security cameras, a brass flag mount, and an anniversary clock.