I have just found this webpage (http://play.lso.co.uk) and I think it's worth spreading. It has been created by the London Symphony Orchestra (LSO), and as they proudly proclaim, on this webpage you will "experience one of the world's leading orchestras like never before".
You can interact with multiple HD camera angles and view up to four streams on your screen meanwhile you listen to the music (click on the image to access to the videos):
Besides, in the section "Explore the orchestra" you can find resources and lots of information about the composition, the composer, the instruments and the performers (click on the icons on the left of the screen to surf the resources. I've found specially interesting the masterclass with the snare drum player).
You can also find teacher's resources with lots of activities to prepare your students to listen and play this composition properly. For sure I will use them to train my students for The Orchestra Rocks concert that will be given by the OSPA in May.
The webpage also gives you access to the same features in Berlioz's Symphonie Fantastique.