The CRC "redundency" problem is simply the reader cant read the DVD. Its faulty or scratched or dirty. DVD Players can simply jump over the problem, so playback there is not a true indication of the health of the DVD.
Try different readers (your burner should be the best reader) to see if you can eventually rerad the one file. I assume you have cleaned the surface of the dVD even if it appears clean? Some alcohol on a tissue works wonders.