Did you ever turn off the sound when you watched an epic film? You probably noticed that the film, all of a sudden, looked pretty ridiculous and lost most, if not all, of its cinematic power. The soundtrack makes up probably 80% of our emotional response to the whole film.
It happens fairly often that I find videos on YouTube which are pretty cool in one way or another, yet they leave me with this feeling that they could be enhanced a lot with some good background music. For a while I thought about ripping those videos and re-uploading them with my own music selection but that would be unfair to the original uploader, hey?
Update: The video was removed by YouTube so I uploaded it with the music.