As noted on Typographica, before Kirby Ferguson's rant Trajan is the Movie Font (see his links to comic red and DVD art) there was Etched in Stone, a little movie that made the same point with some other detail. This movie was noted quite earlier on the AE-List, along with Behind the Typeface: Cooper Black by the same creator.
The Snog Blog has a nice interview with Cheshire Dave, the writer/director of Etched in Stone and Behind the Typeface.
Helvetica, however, gets a big balanced treatment with a touring film, now at The Roxie in San Francisco (thanks SF Chron review). There's also a DVD, which you can rent at finer video stores like Into Video (Upper Haight & Hayes Valley). Here's a sample: