The Hamiltons (2006) on Netflix

The Hamiltons seem to be an ordinary American family, living in a small town in Northern California and dealing with the problems of everyday life. They've also been recently adjusting to the untimely death of their parents. David Hamilton, the oldest, has taken it upon his shoulders to pick up the responsibility for the orphaned family. Twins Wendell and Darlene are darker than the other two siblings and have become more conniving in the past few months. The youngest and most sensitive of the family is Francis. Francis recently found an old video camera his parents owned, and is using it to work on a school project about his family. It's through Francis' eyes that we soon get to know the Hamiltons and realize that there are much more disturbing elements lurking below the surface of "ordinary."