Mac Forums

Hello. I recently bought a Mac book (my first one) and I need to know how I can play the videos I normally played on my PC on my Mac. I wouldn't mind paying for a program (I've only recently checked into the Nidesoft Total Video Converter) except that I know this must be a common problem and thus there must be free software out there that I can download on my Mac and that will work just fine. Any suggestions?

Thank you in advance!