Music Composers Unite!
I found this site very interesting and informative, and hope others might feel the same. The Youtube link is the much more important one, and the Facebook group is included just for completeness.
Thanks Bob https://soundcloud.com/bob-morabito
Description: My name is Brad Frey, and welcome to FilmScoreAnalysis! Here, you'll find full score reductions and analyses of popular film scores, and other film score related media. Thanks for watching!
Without Music videos: (add your music to popular film scenes, which have the original music removed)
Some score reduction and analysis videos (more found on the Youtube link above):