(exercise on p.69)
The show of multiple types of people embraces more than just the "white bread american" types which reaches out to a wider group of people (and supports a black president).  The video did this with more than just color though, it did it with age and style too.  The combining of mediums connects to us on multiple levels, with the complexity of supporting words and the compelling compilation of images.  The combination of mediums strives to reach as much of the receptive portions of our brains as it can, even including music which is supposed to be very stimulating to the brain.  The sign language is a nice touch, which again ads to the all welcoming feel of the video.  From white children to black gray beards, from sleek singers to average guitar players this video encompasses a wide range of human types.  While personally I found the overlapping voices a bit confusing the message definitely comes across and I can see how some people to see it as a magnifying method for the intensity of the display.  The visual text even connects to those of us who learn by reading.  All in all an excellent example of reaching out through multiple mediums at once.