This is also named the 'Voice of god' because it says whatever is on the screen and explains what it wants you to believe/hear. It "emphasizes verbal commentary and argumentative logic" often using a narrator. It gives a very 'proper' answer that is direct to the viewing audience.
Most examples of this are Television news programmes because they show you scenes/pictures and their is a voice that talks over and tells you the preffered meaning of the scenario.
Another great example is nature documentarys, these have scenes of nature, growth and killing and then are calmly talked over by a narrator for example David Attenborough.
Here is a great example: