Answer:
By controlling media sources such as film and radio it allowed the Nazi's to control what information was being fed to the masses thus allowing the nazis to influence public opinion by manipulating peoples perseptions of the events taking place. This allowed the regime to stay in power because if all media is feeding the same information it makes it incredibly easy to put across the narrative you want people to follow and because they aren't hearning any different from anywhere else they will believe what they are being told.
Step-by-step explanation: