I have had the EXACT same problem with an brand new purchased dvd disc an long time ago !
the Disc had NO scratches (clean surface) just like yours, but scanning the disc gave some unrecoverable read errors !! Which indicates that it is an bad pressed / manufactured disc !!
Yet, the disc played just fine too here... except for a few macroblocks here and there, and THAT is what you should pay attention too !!
Macroblocks/distorted blocked images USUALLY means â†’ read errors â† !! In other cases it means bad compression !!
You see, a hardware dvd player may be more forgiving and might jump/skip over the area whit the bad sectors and continue the playback ..
Anydvd however will not do that (from my experience) and will stop/fail the rip process eventually !!
Some clone/copy software however will do skip problematic arreas in an attempt to rip the disc from start to END ..
But by doing that, not all of the data will be ripped!! and just because of that bad arrea that couldn't be read/ripped properly. You'll end whit a bad rip actually !!
that having said, you will be ABLE to watch that DVD rip perfectly on any dvdplayer but you'll watching the movie with lots of macroblocks / audio skips ..
And weird enough the audio/video however will not play out of sync despite of that missing data during the rip process :).