In 1967, the Muppets starred in a series of in-house films for IBM.

Wonderful, hilarious and I can't get back to work.

I bet those videos caused the loss of productivity in the IBM mainframe division that allowed personal computers to take over the desktop...

There is a traveling exhibit about Jim Henson that has plenty of content like this. Recently there was a movie showing of his commercial work and other experimental films that were fascinating.

Check out the Smithsonian exhibit here: http://www.sites.si.edu/henson/

Watch from 3:00-4:30 of the 4th video (IBM Puts on the Dog). That IBM was willing to poke fun at itself in that way must have made it a great place to be.