On my viewpoint, MX Player is one of my favorite video player especially in android phones. it is been downloaded more than 100 million times in Playstore with 4.4star user rating. I used MX Player as my video player on my android phone since I had my first android mobile. Today, it serves as my main video player and my secondary music player. Its simple to used, lots of codec support makes it one of the best video player for android. You can play almost every video format with this player.
But one thing that I feel annoying is that on the free version, the new update contains ad. that used to show when navigating the playlist. But this is just a minor issues.