This is a PBS documentary in six parts of one hour or so about humor in America. Focus is on TV and early movies.
There are some interesting comments on W. C. Fields, Lenny Bruce, George Carlin, Buster Keaton, Mel Brooks, Richard Prior, Charlie Chaplin, ...
The interviews with Seinfeld and Larry David don't bring much new information on Seinfeld series.
More recent developments are not covered.
Overall, and interesting, but not great, documentary.