Ad Petri Cathedram §14

¹⁴ And in this day of ours, as you well know, Venerable Brethren and beloved sons, we also have radio broadcasts, motion pictures, and television (which can enter easily into the home). All of these can provide inspiration and incentive for morality and goodness, even Christian virtue. Unfortunately, however, they can also entice men, especially the young, to loose morality and ignoble behavior, to treacherous error and perilous vice.