OK, So, I've made 4 music videos I want to put on a DVD having a chapter each. When I do, 2 out of the 4 have pushed the video back about 1minute into the song. So, when I try to play the chapter, the music starts, but the video is just black. Why is this? How can I fix this? I love Vegas, and think it's the best NLE, but Architect sucks.