It’s known as “The Dickson Experimental Sound Film,” and dates back to 1895, the same year movies were born. It was an experimental short made by William Dickson, designed to test syncing up moving pictures to prerecorded sound, a system that he and Thomas Edison were developing known as the Kinetophone. But this brief footage is not so ancient that you can’t clearly make out two men, waltzing together, as a third man plays a violin in the background. It’s grainy, faded, and, given the clip is now 125 years old, more than a little worse for wear.