Don Adams hosted a show where aspiring actors and actresses came on and did a "screen test." That is, they performed a famous scene from a famous work, with another famous actor, such as Mel Brooks or James Caan.
Even though they weren't playing comedy, the three clips online from the show are the funniest things you will ever see, especially the one with James Caan as Tarzan, although the video of compiled clips involving Mel Brooks on the show is darn funny too.
The show opened up the screen test world to some actors who might never have got to do many at all.
It also shows you what a screen test is like.