I've got some video files on a DVD (not a video DVD) that won't copy over because there's something wrong with the DVD and they fail CRC check. I believe the problem is only in a few places, and since ...
I've gotten that on a few older CDRs I burned a few years ago .... and you're probably screwed AFAIK, assuming the disk isn't dirty or doesn't have a buncha fingerprints or something like that.