If you want to make RMVB files playable, you can convert RMVB to MP4 or other formats. You cannot play RMVB files with Windows Media Player or QuickTime Player unless you install a RMVB codec.
The RMVB (RealMeida Variable Bitrate) format is not compatible with many media players.
A good RMVB player really matters if you want to get excellent audiovisual effects.
