Try de-muxing the video using something like TMPGEnc. If the VOB file is corrupted, it is unlikely to extract correctly. If it does, you most likely have a burn problem. I've seen a downloaded copy of TR47's ESB play flawlessly burnt on TDK DVD-R, choke on Imation DVD+R written at 4x, and play fine on the same media burnt at 2x - all from the same files. YMMV...
Try de-muxing the video using something like TMPGEnc. If the VOB file is corrupted, it is unlikely to extract correctly. If it does, you most likely have a burn problem. I've seen a downloaded copy of TR47's ESB play flawlessly burnt on TDK DVD-R, choke on Imation DVD+R written at 4x, and play fine on the same media burnt at 2x - all from the same files. YMMV...