According to The Twilight Lexicon :- All four previous movies as well as 14 featurettes (running anywhere from 1-15 minutes) are now available on Xfinity On Demand (featurettes are also available on Xfinity.com/TV). The featurettes include interviews with the cast and crew, details behind the set and costume design, special looks into the lives of your favorite characters and a catch up traile…