THE CAMERA SPEAKS is a Vitaphone short about old-time cameramen talking about "the good old days" and often showing a little scorn for the early film-making techniques of the stars and filmmakers they speak of.
When one of the old-timers falls asleep, he dreams about the past. His reflections include a glimpse of a theater marquee bearing the names John Barleycorn and Jack London; an old-fashioned fireman's parade; Gloria Swanson emoting with a baby and a dog in some quickie, probably a two-reeler; William Jennings Bryan giving a speech at a crowded rally in New York City's Union Square with the men in their derbys and the younger men wearing caps.
The special effects include the dream sequence with a ghostly image of the man rising from his chair to address a man whose face is superimposed on the camera lens. The two of them engage in a conversation about the past in slightly mocking tones.
Not much can be said for this except it does allow us to see how far movies in general have progressed since then.