Now here's some old-fashioned comedy. In this 1903 clip, Levi & Cohen, the Irish Comedians poke fun at ethnic stereotypes, as well as vaudeville itself. The best part of the act is these two comedians getting panned by the audience. Thanks to Brent Eades for producing the video, and AntiqueFilm for posting it.
WARNING: The clip includes a music track (Porcupine Rag, 1909)