He is Vashek Kroutil, a YoYoFactory sponsored member, and an EYYC (European Yoyo Championship) 2010 1A Champion.
This video features his tricks and combos! However, the place on the video is minus 10 degree Celsius. Vashek, aren’t you cold?

>>Yoyofactory x SLUSNY - Vashek Kroutil - No Way