Okay, so I’m not the sharpest tool in the shed sometimes. Or it could be that Chuck’s camera (a Sony) produced a movie clip format (.MPG) that iMovie didn’t like. At any rate, I imported the clips (which were .AVI) from my camera (a Canon SD500) into iMovie, and had no trouble editing, adding titles, the whole nine yards. Anyhoo, here it is: 45 seconds of fireworks! It’s 3.4MB, not too bad size-wise.