This is a cute little puppet trailer for Sundance that ran during the 2004 festival. It tries to dispel the myth that with so many films being shown at Sundance, you can just show up and wing it.
I'm not sure if this was a stand alone trailer or just one in series, but the two puppeteers who worked on it were Pam Arciero and Tim Legasse.
24/01/06 Update: This was, in fact, one of a series of trailers made for Sundance in 2004. If you want to check out the others Sundance Myth spots from 2004 click here for the relevant search results at Atomfilms.