Ult Player is a free video player for Android that allows you to watch videos offline. The app is simple to use and is one of the best video players for Android tablets and phones. 

The player has an easy-to-use interface, allowing you to control the volume and playing progress by sliding on the playback screen. It has a built-in file manager that lets you work with it from the beginning. It is also capable of playing in portrait mode or in landscape mode.