It’s a full featured windows 8 app that utilizes all Windows 8 features with touch optimized controls. PressPlay Video, a native video app for Windows 8, provides not only a good user experience for playing video files, but also supports multiple formats including MKV and FLV.

Exclude those paid ones, I’ve only found one that’s capable of playing MKV videos. And unfortunately, there are only handful apps available that claim MKV-ready on Windows Store. But it’s not that easy to have the same thing on Windows RT tablets like Microsoft’s own Surface. You will have to install a codec pack like Windows 8 free all-in-one codec to play and enjoy them. Windows doesn’t have the codec by default to play a MKV-encoded video. Because it’s also an open source project and license free to everybody, it’s been widely used nowadays as an open standard HD media format.

MKV, the Matroska Ultimedia Container, is a very popular video format that can hold an unlimited number of videos, audio, pictures, or subtitle trackers in one file.