There is a new build that they are testing for Windows 10 for phones. WindowsCenter.ir posted this video showing how the new video app works in Windows 10. The video shows that the app uses a folder based navigation system, you can name your own folders as well as search for individual video files. Windowscenter.ir also says the app is smooth and plays MKV files natively. Take a look at the brief video below and share your thoughts in the comment section.