I have been using this app for last 4 years and I still preffer to watch videos in this app.
Their User interface and desing is very simple and easy to understand. The app has lots of option for a better playing of videos.
On swiping up or down the right side of the display while on app this will increase the volume. Where as on swiping up and down on left side of the display that will alter the screen brightness.
These features help us to have a simple and fast experince. Like this mx player consists lots of features. We have multiple decorder option for both audio and video. The app supports most of the video files also.
This also can be used as an audio player too. But as an audio player it is not that much good. But as a video player it is the best choice.