It is available worldwide for desktop operating systems and even for mobile platforms, like Android, iOS, iPadOS, Tizen, Windows 10 Mobile, and Windows Phone. On the other hand, the VLC media player is a portable, free, and open-source cross-platform multimedia player. However, MKV is not the video file that all media players can support to play. MKV is also known as Matroska Video file, which is free, open multimedia that differentiate from MP4, AVI, and many other standard extension files. 03 2 Tricks on Playing MKV Files on VLC Smoothly.02 4 Solutions to MKV File Not Playing on VLC.