This is a clever adaptation of How the Grinch Stole Christmas starring The Emperor, Darth Vader, Ewoks, Santa and his elves. It is about 16 minutes long. Apparently two more parts of the story were planned but never produced.
Go to Spike TV's site to see the entire show. Unfortunately my blog style cuts it off :(
The trailer for the rest of the story is here:
Silent Night, Jedi Knight and A Very Vader Christmas
Go Santa, Go!