The warning that’s on the wrapper:
* The audio side of this disc does not conform to CD specifications and therefore will not play on some CD and DVD players.
My addendum to the warning:
** The disc is kind of thick, but if you can squeeze it into the slot loading drive, both the audio side and video side of the “dual disc” can be successfully ripped with free Macintosh applications such as iTunes and HandBrake Lite. You can probably even remove the disc from the drive, with a little wiggling. You can then archive or discard the physical “not quite a CD” disc using any means at your disposal.