A free app for Android, by Player : HD Video Player.

Video Player – Media Player is an Android app that is capable of playing all kinds of videos, including MKV, MP4, M4V, AVI, MOV, 3GP, FLV, WMV, RMVB, MPG, etc. The app has an amazing UI that will allow you to easily manage your files and enjoy your favorite videos.

It has a powerful equalizer that will let you feel like being at the cinema. It also has a beautiful look and clean user interface. The app has a great HD video player, which will allow you to control the volume, brightness, and playing progress by swiping on the play screen.