com·men·tate 
/ˈkɑ:mənˌteɪt/ verb
com·men·tates; com·men·tat·ed; com·men·tat·ing /ˈkɑ:mənˌteɪt/ verb [+ obj] : to provide a description on a radio or television program of an event (such as a sports contest) as it is happening
▪ He will be commentating on tomorrow night's game.
▪ He will be commentating on tomorrow night's game.
