Translation:My older brother watches anime on TV every day.
"My elder brother watches cartoons on television every day." Rejected. We were taught elder (=年上・年配) is more polite and better for people, older (=より古い・の方が古い) more for things. Ironic that they call 'older' old-fashioned, which is the sense of 'old' that's the very reason you don't want to use it . . .