That one thing is to provide the user with a better browsing experience. Even though there are similar applications on the market, they have all been designed to do one thing differently.
As I said before, it is a cross-browser application written by a group of individuals for the sole purpose of playing media files on modern computers. This player also has a function where you can watch movies and trailers.
There is an interface similar to iTunes, and there are basic features such as list view, folder view, repeat, and shuffle. The free online player, KMPlayer is similar to iTunes in many respects.