We can convert him to watch tv programs related to his aim of becoming something, or his interests and hobbies, then your classmate will be away from ill things in tv. and he will know a lot more about his hobbies and his ambitions.
you can recommend him to watch programs related to outdoor games and sports to make him aware of its importance, as tv will be most helpful means for him to explain the importance of games and hobbies.
in this way you can keep him away from tv and keep him involved in outdoor activities. you should also accompany him in it.