I must be honest and say that I found it all a bit too much.

The images are all as well known as is the music, just combining the two will be watchable but what was the message? At one point it was linking, Al Qaida, Iraq, the Tsunami and a nuclear bomb in a song which had nothing to do with any of it.
Anybody can edit spectacular images to a well known song, the skill is to create something new out of it, and for me this was a bit too slushy-flag waving-sentimental for my liking. It was also very biased and distorted aknowledging only the victims on one side of the world.

Finally there was no mention of the music in the end credits, without which the whole video would have been nothing more than a voyeuristic slide-show.

At the risk of being brutal, my opinion is that it's already been done a lot, and a lot better.