full screen video on pdf article

[giovani12]

I have create a folio  for my android app that includes articles on pdf format.On some pages i have videos.I have set the from the folio overlay option to play on full screen , but when i click them what actually happens is that the video plays on a black full screen with the video itself to be in the middle anδ on a small dimension.Why does that happen?I include a print screen just to have a better view of what i am talking about.Thanks a lot