What is Weiss Schwarz?
Weiß Schwarz is a Japanese two-player dueling collectible card game created by Bushiroad, based around (and in collaboration) with various anime series.

The game is separated into two factions Weiß-side and Schwarz-side, which are German for "white" and "black," respectively. 

Here is a better video on how to play the game: http://www.youtube.com/watch?v=SXzMtFp_ZN0