Here are links to some prototypes, all created for existing courses:

Beethoven: Symphony No. 3 "Eroica," 1st mvt.
View demo here (full-screen viewing recommended).

Beethoven: Symphony No. 5, all.

Beethoven: Sonata, Op.111, 2nd mvt.

Mozart: The Marriage of Figaro, Act II Finale.
View demo here (full-screen viewing recommended).

Mendelssohn: Violin Concerto, 1st mvt.

Brahms: Symphony No. 4, 4th mvt.

Bach: Cantata No. 4, 1st mvt..
(This is in preliminary stages, but is my first experiment using YouTube api to create "chapter" links that work with a YouTube video.
The score is already embedded in the video and thus doesn't appear separately).

Note that each of the guides may take a little while to load. For each guide, clicking on events in the analytical outline provided will automatically move to the proper spot in the score and the audio (and video where supplied). However, as of now, the score pages do not turn automatically as the music plays.