What is the subject of hamlet's second soliloquy the famous to be or not to be speech?

In Hamlet's second monologue, he responds to a discourse that has quite recently been conveyed by one of a voyaging gathering of players, or on-screen characters, as of late landed at the mansion. This discourse concerns the antiquated story of the fall of Troy on account of the Greeks, and the terrible murder of the Trojan ruler, Priam. The Player gives off an impression of being overwhelmed by the feeling of the scene and winds up with tears in his eyes.