MKV Player is a convenient player, which is designed primarily for playing MKV videos. For that reason, you might try the one available under the Media Player Classic and BSplayer programs. In theory, the player is associated with the files associated with it during installation, so as long as you click twice the mouse, you are allowed to play the file. Basic functions include playing back, pausing, scrolling, and extending the display, as well as adding extra features.
Using MKV Player you can create playlists, save them and edit them. You can use the built-in search feature if you have many video files on your hard drive.
You may also consider KMPlayer as an alternative to this player, as it can play music from many different formats in addition to MP3.