Instead of extracting your rar files to watch the movies that leads to a bigger disk space consumption, Dziobas Rar Player makes it possible for you to watch them without extracting. Other available features include image extraction, subtitle support, automatic subtitle download, play all files without codec, and more. You can download this freeware from the homepage or Softpedia.

via RAR Video Player: Play RAR Video / Movie Without Extracting RAR on Mac & Windows