I'm going to throw my two cents in here. I've had difficulties in the past with burning video_ts folders. Maybe it's my burner, maybe it's Nero, maybe it's something else, but it's about 50-50 as to whether or not it'll work. On the other hand, using Alcohol 120%, I never have a problem burning an ISO. It's gotten to the point that when I do download a video_ts folder, I make an ISO image of the DVD video, and then burn the ISO to a disc. Sure it takes a bit longer, but I deal and don't have as many junk discs. Seriously, it was becoming just insane.