Softwares Required For Playing Music Videos

Video Lan Media Player (Plays almost all videos without needing any codec)
http://www.videolan.org/vlc/

K Lite Video Codec (All required codecs packed into one package)
http://www.free-codecs.com/K_Lite_Codec_Pack_download.htm

Real Player Alternative Codec (You do not need this if real player is already installed)
http://www.free-codecs.com/download/Real_Alternative.htm

Media Player
http://sourceforge.net/project/showfiles.php?group_id=82303&package_id=84358