Video Player is the best free media player for Android. It can play all formats of videos and audio such as HD, full HD, 4K, and many more. It has a built-in media library to help you easily find all your files. You can also create a new folder to organize your files and playlists.

All formats supported:

Video formats: 3gp, avi, flv, m4v, mkv, mov, mp4, wmv, etc.Audio formats: mp3, wma, wav, aac, etc.

This app has a built-in mp3 player and can play all types of mp3 music. It has an audio equalizer and bass booster. You can adjust the music to make it more fun. 

The HD player can play all formats of videos.