Crashing while playing?

[Sinormann]

Hi!
I like to watch some series while i play. But there is one problem that always show up.
When the mediaplayer switch to the next episode (or video) the video-screen at the secondary screen moves to my primary screen and causes the game to minimize and crash.
I tryed to press the famous ctrl+alt+del but i cant close any tasks. How do i fix this? How can i make the mediaplayer to only show movies at the secondary screen?