View_From_here sent me this video and I must say it moved me a lot. Watching the children's reactions was particularly enjoyable. Thank you, View.
Enjoy:
[Some people on youtube criticized this performance because it was filmed to celebrate the 100th anniversary of the Sabadell Bank. I understand people being upset about banks these days, but the music is still beautiful and the reactions of the spectators to the unexpected public performance were genuine and quite touching.]