Voldemort won the final battle against Harry, but Harry didn't get killed and decided to escape the invasion with his beloved, Hermione.
(See "About This Video" section on YouTube for in-depth description.)
Basically, Harry gets jealous when Hermione starts dating Krum and realizes his feelings for her. She gives in to his feelings, which causes Krum to get ticked. She realizes she loves Harry, Krum lets her go, yay!
