That's
Iman Sadeghi , TM Javanan Iran wrestler (60 kg ) who won Gold in World Junior Free Style Wrestling Championships in Zagreb , Croatia just a few days ago.
What Iman did in that video is an improvised version of wrestling technique called " eshkel gorbeh ", and he did it in the semi-final of World Junior Championships in Zagreb , Croatia which he won and went on to win Gold medal just a few days ago.
TM Javanan Iran won the World Junior Championships in Zagreb for the first time since 1995 with 3 Gold medals & 3 Bronze medals.