the Sacred Grove seems much darker in this version. not just because of the quality of the video - i mean the atmosphere of the game. the skeleton warriors and undead dogs. part of this video was seen in the 2nd trailer for Zelda TP, the one from Game Developers Conference 2005.
about midway through this video, you see Eldin Bridge ruins but there are rows of torches lit up, not seen in the final game.
Zelda Twilight Princess went through countless changes -- there are so many things seen in the offical trailers, gameplay videos, official screenshots and magazine scans that are either not seen at all in the final game, or changed significantly. too many to list.