Thanks, Iain, for this video. I love it. I love it so much that I have to keep that in my blog. And the remark that came with your forward:
.... watch something absolutely stunning, technically and muscially. The musicians don't know each other, as they are from different places around the world. So, the sound and image technicians (volunteers) did an amazing job capturing the sound of each of the "singers", individually and globally (they are outdoor performances and it is extremely difficult to do without "external noise"). They managed reaching a remarkable level of musical purity. We come to this wonderful musical achieved through high technology, that joins people around the world for an instant, making them feel and talk the same universal language: music. Moments like this, with great dedication and generosity, make us still have some hope in the "human race".
Who says you have to be professional to do great things?