Take a look at pdcomedy.com.
There is a large and growing collection of public domain classic comedy,
both intended and unintentional.
intended comedy gems include 30
whole episodes from The Lucy Show, starring Lucille
and Hardy in Flying Deuces, Charlie
Chaplin in The Rink and Buster
Keaton in Steamboat Bill Jr. Unintentional
hilarity comes in the form of The
Killer Shrews or Bela
Lugosi's Ape Man.
For a full list go to the home page at pdcomedy.com,
there's much much more.