Commentry

prior to TV was only on radio. Here is a nice article about one of those commentators

An excerpt

Commentary, for Suresh Saraiya, is like playing cricket: you need to know the game
inside out, and you need to have the right technique, which is a good
voice, clear thoughts, and the play of phrase. Saraiya must have had
all that, one can tell that – because when he tells a story he
generally has your attention, and doesn't leave you disappointed by the
end of it.