That one comes with the game, right? It was produced by Blizzard. After Arthas died, his father told him that "the kingship is not eternal, my son." Then Bolvar put on the crown of the Lich King and Blocking yourself on the Frozen Throne, the cutscene will appear every time after defeating Arthas. You can also watch this video on the Hero Monument in the middle of Dalaran. It's quite good.