Couple options...
Change the extension from .mov to .mpg
Run it through a converter like Hampster or Handbrake
Depending on what codecs were used to create the file, those may or may not work. My camcorder (JVC) creates .mod files. Premiere will have nothing to do with them. If I rename them to .mpg Premiere will open them, but due to the way JVC sets the audio codec, the audio will be missing.