Just as an aside .... way aside .... a neighbor, friend, County Supervisor and local water operator/engineer whom I deal with in both personal and professional capacities on a very regular basis, is the grandson of Charlie's personal video-photographer. Remember that this was back when the cameras were hand cranked, and so frames per second were sometimes a bit variable, which was something of a trademark of Chaplin's films.
Thus making the films look somewhat like the motions of your new tin toy dancing Charlie!