Ed,
The DVD videos varying in quality. My first DVD "Processing Fingers with Acid Peroxide" is of a slightly lower quality than the "Gold Filled Scrap", "Refining Silver A to Z", and "Fundamentals of Pt and Pd" DVDs. The latter two are of super video quality. The reason for this is that the video editing software I originally used was not as expensive as the software I used to create the second two DVDs.
Don't get me wrong all the videos are good, but the Gold Filled, Silver, and the Platinum DVDs are the best.
Maybe some of the other members who own all three will chime in and give their opinions.
All of the DVDs are full screen and normalized volumes. They all run at least an hour and a half of play time also.
Steve