This article will introduce the easiest way to install MKV codec. That’s because the MKV codec is not provided by WMP by default, and you need to download the MKV codec for Windows Media Player. However, when you want to play MKV files through it, you will only get the error message “The file type is not supported”. How can I get it to support this file type? Is there any plugin should I add to it?”Īs the built-in media player on Widow, Windows Media Player (WMP) is commonly used to play different videos.