I am at a loss, I recently updated Pinball X and now none of the playfield tables I made (MP4) play anymore. These videos (1920x1080 MP4) had been displaying fine since November last year when I set it all up.
Nothing else has been changed on the system other than doing the PinballX update.
Interestingly the PinballX update caused other issues, my 3rd monitor vpinmame displays were all without sound and the sizing is now out as well.