Wow! The first time that I looked at this I might have agreed with Glen and Tim, but at my second look I realized that the music is spot on. To me throughout the beginning and middle portions the music highlighted the majesty (probably the wrong descriptive word) of physics and the physical laws that govern the natural universe. Rather than indicating pending doom, the music helped with the observation of the power of natural systems and its impressive nature. As human structures and then the entire planet collapsed due to the massive energy released, to me, the music seemed to have a more reflective, melancholy perspective.
Excellent work!!! Kudos also to the animation team that created this video.