VLC media player is a part of pc or now a days part of mobile phones mostly used for watching movies and listening music. I have never used any other player than this. It is very easy to handle with so many keyboard shortcuts which can be easily remembers by any one. It can plays all formats like MKV, mp4, mp3, Avi, etc with effectively.
VLC media player becomes very popular in this days and it can be available in application for mobile phones. Also You can take snaps at time of watching any movie or video. If their is a audio available in different languages you can used it on VLC. I greatly appreciate this media player.