The collector’s edition of Metal Gear Solid 5: The Phantom Pain comes with an extra story episode that was cut from the game.
The Metal Gear Solid 5 collector’s edition comes with a blu-ray disc that holds all released trailers and some behind-the-scenes footage. More importantly however, as discovered by Gamespot, it features a story episode that didn’t make the cut.
The episode was intended to be number 51, and is called Kingdom of the Flies. It’s not finished, so doesn’t feature full cut scenes, but it’s all voiced.
Kingdom of the Flies expands upon the game’s story and helps to tie it better with future iterations. The motivations of Liquid Snake and Big Boss specifically.
That will surely end up on YouTube somewhere and would be something you could watch after finishing the game.