This web site is pretty neat. The Google Cultural Institute set up a couple 360 degree cameras up on the stage of Carnegie Hall during a performance by the Philadelphia Orchestra. You can choose which camera you want to use and also drag around the angle to watch what you want to. Click on the image below to visit.
I ‘ve watched this several times now. I tend to focus mostly on watching the conductor, Maestro Yannick Nézet-Séguin. I think that conducting is much like performing in that it’s necessary to watch and absorb how great conductors express themselves through their gestures and facial expressions. When you’re performing with an ensemble you have to watch the conductor closely, but my mind is always focused on performing rather than studying the conductor. With a video like this you can simply watch.
There are some other performances you can view too, including the Berlin Philharmonic in a rehearsal.