There's a ton of cool stuff on the Mediaburn site. They have hours of video from Bill Veeck's career dating back to the 1950's. It includes raw footage from when a documentary-maker followed Veeck around during 1978 spring training. Among other things, it shows Veeck trying to get a message to Fidel Castro
as part of a scheme to conduct part of spring training in Cuba.
They also have part of the 1959 World Series film
, narrated by Vin Scully and several of those "Memorable Moments in Chicago Sports"
segments that WGN used to show during Cubs rain delays.
Also this gem: The last couple innings of a random Sox telecast
from September 1976 -- a blowout loss to the Twins. You really get a sense for how gritty and uninviting the old park looked in those days -- especially on a cold September night with only a few hundred fans in the stands.