It is a John Williamson CD disk marked 'CD/DVD-V/DVD-A/SACD Players.' However, the small print proclaims 'Playback problems may be encountered with some equipment.'
Not a pirate, a purchased copy. When we checked it, the computers were all it would play on. About 10 other gift CDs played on the same players OK.

As the king of Siam said, "It's a puzzlement!'