This Video Contains música from the "Harry Potter and the Half-Blood Prince" Soundtrack - composed por Nicholas Hooper. Sometimes on the video it gets kinda scratchy, which is annoying, but only when the música gets loud, so oso, oso de with it :)
Hermione has recovered from being tortured and is thinking back on the darkness in her past to find the strength to help Harry onwards on his quest. Basically Hermiones emo side :)