Follow-up question: was it controversial at the time?
Aphod’s Believe it or Not (translated from the original Aramaic).
It was basically a movie about supposed supernatural phenomena. There was a cat with two heads, a horse with no legs, a brief shot of a man walking on water, and a juggler who could make the balls turn into birds.
If your criteria allows for short films and ones from other languages, the five minute film La Passion Du Christ fits. It’s from the 1800’s, which was so long ago people were probably going to drive-in theaters on their horses to see it.
They’d likely have it in a darkened room instead. Horses don’t have radios so there’s no way to tune in to the audio.
I’m pretty sure they had silent films throughout most, if not all, of the 19th century
Here’s the joke
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Here’s your head
Horses not having radios is a tragedy no one should ever joke about. I don’t care how long ago it was. We’ve moved on from such foal nonsense and society’s put it’s hoof down. You either saddle up or bite the bit and accept your joke isn’t mane stream.