I just came across a video that is so wonderfully done I just had to share it. The Hermione Mix video is credited to Pogo and Jeesh. The video is a compilation of scenes from several Harry Potter movies along with movie dialogue set to original music. The majority of the scenes focus on Hermione Granger, but there are several other characters in the video, too.
That description pales compared to the end result, and I encourage you to watch the video to see just how perfectly timed and magical it is.