commentary
noun
Definitions
A series of comments or annotations; especially, a book of explanations or expositions on the whole or a part of some other work
(usually in the plural) a brief account of transactions or events written hastily, as if for a memorandum
Example: Caesar's Commentaries on the Gallic War
An oral relation of an event, especially broadcast by television or radio, as it occurs
Example: We listened to the football commentary while watching the match.