The disc has the usual DVD symbol so it should be playable. Finalising obviously can’t be an issue on a bought DVD-ROM disc. The disc was immaculately clean, as-new, but I cleaned it with Reveel until squeaky clean and got the same message. Checked the player’s software is up to date, power-cycled it… no change.
Tried it in our very old Sony HDD/DVD player: ‘Cannot play this disc’.
Tried it our previous Blu-ray player (Sony) and got the same message as in the above picture.
Then… played on our first (Panasonic) Blu-ray player and it played perfectly. What the Dickens is going on?
The internet seems to have no record of this disc being problematic. Go on, what have I missed and how can I solve it?