A free app for Android, by Nirmal Labs.

Media Player for Android – All Format Media Player is a professional video playback tool. It supports ALL video formats, including MKV, MP4, M4V, AVI, MOV, 3GP, FLV, WMV, RMVB, TS, etc. It also supports many audio formats, including MP3, OGG, AC3, MP4, etc. This app is a powerful and professional tool for playing videos and music. It is designed to be a universal player for all Android devices. It is also compatible with many other video and audio formats.

This app can play all types of videos and music files. It can play in a window in the background. It can also play in the lock screen or the home screen. It can also be used as a player for audio files.