In my opinion,

That video is so overproduced that the story behind it is lost in a giant waterfall of half-second-long clips and flickering lights. I did not see an apparent connection between the music and the song, except the viewpoint/clip changing on the beat of the music - I was actually looking for it, but the only thing I noticed was a clip of someone sleeping when the singer said "dream". It's nicely produced, sure, but I still can't make more of it than the aforementioned random anime segments dubbed with a song.