I found this video on Youtube, and its of course about Edward and Bella.
Even though these arent the right people, its still pretty good.
Edward : Gaspard Ulliel Bella: Danielle Panabaker
Song : Look After You by the Fray
Another fan made Twilight Trailer from YouTube. I thought it was pretty good. Kristen Stewart as Bella, Robert Pattinson as Edward, and it appears to have Steven Strait as Jacob. The video was made by KitCatXx on YouTube.