That's not true at all, there are plenty of non-Fords in movies and TV. Sure there are a lot of Crown Victorias, but there are also a lot of Caprices. The Impala (both the 2000+ models and the olders ones) are quite popular too. And Mustangs aren't always used as sports/muscle cars, there are tons of Firebirds, Camaros, and Chargers used in lots of popular movies. There are certainly no more Fords in movies than there are GMs, or Chryslers.