This consists of interviews with the cast and crew, all of whom have something compelling to add within their area of expertise(and there is a very clear love of what they're working on), clips from the movie, behind-the-scenes footage, and incomplete effects shots.
It's 11 minutes long. This is found on my library's copy of The Hobbit: The Battle of the Five Armies. The focus here is on the song The Last Goodbye, which also has its own music video on the disc.
They talk about that the final song is a big thing in movies, and they had to top the first two, by Neil Finn, and Ed Sheeran, respectively. They decided to use drawn tiles. Billy Boyd came up with the melody for the song he sings in The Lord of the Rings. In the two weeks, they recorded at least one, sometimes two, new versions of the song every single day. They got a lot of it done in the ADR room. Every line, sometimes just a single syllable, they would record different versions of them. 430 takes! 9 straight hours!
I recommend this to any fan of the property. 8/10