Entropy is when something is unexpected or unpredictable to what is normally seen. For example when something happens that would be completely different to what you would expect. These examples are seen throughout various music videos, like people with super powers or being dressed in a certain way.
Redundancy is when something is expected or predictable to what is typically seen. for example in a rap video when you see the voyeuristic treatment of women, lots of money, loads of cars, close ups of the artists...etc
Music videos use a range of both methods and they are usually typical to the genre of music, for example hip hop videos don't usually contain much entropy, but rock music videos range from many different themes and idea.