DVD Player will only play a few tracks

Hello there everybody,

I have a problem with the DVD Player app. I have a TV Show on DVD, however the application can only play three of the six episodes on it. The three unplayable ones however can be played with a physical DVD player and on TV. No other application can handle them either. Yet they are all encoded in the same format, I reckon anyway.

Does anyone know what this may be about? Thank you.