commentary

noun3

1. •
   A series of comments or annotations; especially, a book of explanations or expositions on the whole or a part of some other work.

   • This letter […] was published by him with a severe commentary. — 1827
2. •
   An oral relation of an event, especially broadcast by television or radio, as it occurs.

   • We listened to the football commentary while watching the match.
3. •
   [usually plural] A brief account of transactions or events written hastily, as if for a memorandum.

   • Caesar's Commentaries on the Gallic War