Download K-Lite Mega Codec Pack
Every day new video formats are created, compression is getting smaller and video definition and quality getting better, the only problem with this, is that not many players are capable to support such formats. K-Lite Mega Codec Pack is the application you need; it contains thousands of video and audio codecs you need to install in your computer. Just by installing it in your machine any player of your preference would be able to play your favorite videos; it doesn't matter in which format they are.
This is a compact and very light application that will work excellent with any operating system.