As you may already know, YouTube has a great assortment of classical music videos. Here are some of my favorites. Please share your own favorites.
Kogan Plays Shostakovich Vk. 1 (3rd mvt.)
Milstein Plays Paganiniana
Mozart - Requiem (Solti/VPO)
Perlman Plays Tchaikovsky Vk. (1st mvt.)
Horowitz Plays Scriabin Etude Op. 8 No. 12
Ligeti - Etude 13 "The Devil's Staircase"