I shifted my view to purely emotional and I felt that the first half of the video was focusing on friendship, happiness, and an almost beautiful perspective. Then about 3 mins into the video the images change and become sad, than angry and regretful. Even the song which seemed to add to the beauty of the first part changes to become angry. I really enjoyed the video and find that it is unique because of the emotions that are felt by the viewer.
Sorry if I am way off base with anything I have said. I thought I would go out on a limb to let you know how I was feeling when I watched it.