Three possible solutions:
1. Convert the movie (in this case it seems you only need to convert the sound) on your PC to a format/codec-combination that is supported by the TV.
2. Use a device that can play this movie (like your laptop, or maybe some media players) and connect it to your TV via a hdmi-cable or some wireless equivalent.
3. Buy another TV. Be sure to try it with this particular files before you decide.

Kees