There are four behind-the-scene videos uploaded by the official Les Misérables YouTube which feature great insight into the production of the film. The above video is a featurette on the new song written exclusively for Hugh Jackman for the movie-musical adaptation of the popular musical. You get a great general feel for the song and how Hugh sings it (which is just beautiful).
There are also videos for Production Design, Costume Design, and Hair & Make Up, each showing a lot of previously unseen footage from the film: notably, clips of “Master of the House” and “Lovely Ladies.” There’s really too much information to list individually (especially all the looks at Hugh’s Valjean spanning over the years), so I highly recommend watching them. You can view the other three below.