Sid Caesar was one of television’s original pioneers, figuring out how to use this then-new medium in creative ways on his 1950s sitcoms Your Show of Shows and Caesar’s Hour.  The sketch, Beethoven’s 5th Argument, is long by today’s standards but what an amazing and still-fresh premise.  There’s a laugh out loud moment shortly after the 4 minute mark.  Then stick around for the final payoff.