Featurette for Sherlock Holmes takes a look at those responsible for the film's musical score.
The musicians are Hans Zimmer, the composer nominated for his 8th Oscar for this score. The gentleman on the boat in the red pants is Lorne Balfe, (co-music producer) Alexsey Igudesman is the gentleman playing the violin on the beach and on the elephant, and the women are Ann-Marie Calhoun who is playing the violin and also in the box and Tina Guo plays the cello on the car. Davey Johnson has the long bleach blonde hair playing the banjo and Diego Stocco is banging on a cello like a drum towards the end of the video.
All of these people are the original musicians that played on the movie and Guy Ritchie and Robert Downey Jr. even make an appearance.