How do I play OGM video files?

I recently clicked a link to download a movie and when I unzipped the file it contained something with a .ogm extension. Windows doesn't recognize the file. Is this a virus or did I do something wrong? While it's always smart to scan any download for viruses, the OGM extension is typically associated with video files. OGM is the Ogg Vorbis video container format, similar to AVI or MP4, that generally contains Ogg Vorbis audio and a video stream that is often DivX, XviD or Theora video format. To play an OGM file, you have one of two easy options.

18:37:02 February 26, 2006, Sunday (PST) Source: Jake Ludington's Digital Lifestyle

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