FF Player

FF Player is an easy-to-use media player that offers all basic functionality and adds quite advanced features, all within a simple user interface.

With the advanced integration with Windows Explorer and the Directory Mode the player is ideal if you want to play back whole series or music videos. Just start one file and the FF Player will automatically play the files from the current directory.
FF Player uses DirectShow so you will need to install codecs for the media you want to play back.