Parallels to Network
Though not a horror movie, Network has a similar central theme. Howard Beale is a veteran news anchor who goes insane on the air only to be rewarded with his own show. He legitimately sees himself possessed by some higher knowledge and that he is the prophet of these ideas for the masses. The network he works for doesn't care one way or the other as long as ratings increase.
And what was the name of that fictional network? UBS. The same as Late Night with the Devil.