According to the YouTube description:
Nathan Gioacchini wrestles Dzhokhar Tsarnaev at the 2008-2009 Methuen High School Invitational. Final score was 15-3 in favor of Nate. A great win for America!
This video was made for comedic purposes only. No one is trying to portray themselves as a hero, it was just made for fun. Also, my deepest sympathies go out to all those affected by the Boston Marathon bombings and the aftermath that took place in the surrounding areas of Boston.
[H/T Big Lead]