The piece is basically a promo for Spike Lee's new HBO documentary. Regardless, it makes an important contribution to the film by giving the audience an understanding of its tone and voice. A four hour documentary may seem too long for some, and not long enough for others. What can you expect from a film that long? This radio piece certainly gives you glimpses of the issues that will be tackled in the film. It gives you a clear idea of what to expect and what not to expect.
As for myself, I will definitely be watching.