Something to remember is that the silent films were shot at a theoretical rate of 16-2/3 frames per second and projected at 18 or more. Motion was speeded-up a little.
But the cameras were hand-cranked and so very versatile. For a film such as the Keystone Kops, the camera operator would crank extra-slowly, speeding up the motion when the film was projected and adding to the comic effect. For proper motion, you cranked the camera precisely 2 turns per second: something our King learned when he took a turn at operating a Canadian newsfilm camera during his 1937 Royal Visit.
Modern equipment operates at 24 frames per second and there is not much which can be done about that.
The result is that motion from old films is speeded-up by close to 40%.
Look at WWI films of soldiers marching: they appear almost to be using one of Monty Python's "silly walks". In actual fact, they are marching at exactly the same pace as used in the Canadian Army today: 120 30-inch paces to the minute.
Those guys in the factory are working true and fast.... but just not THAT fast.
Still, it's a helluvva lot faster than I could do it!