summarize lines 430-500 in Act 2 Scene 2. What is the excerpt about?

Assuming our line numbers are the same, this is the First player's narrative of the ancient Greek Tragedy of Pyrrhus and Priam. This revolves around the killing of a brother and the anguish of Priam's wife Hecuba. This of course id indulged by Hamlet who likes the juxtaposition to his own mother's reaction.