Why my video doesn't display on the media windows in engine editor?

already i’m sorry if my english is not perfect…lol

i don’t understand why my video file doesn’t work when i launch it with Framework.
i saw tutorials and I do all i have to do (i think…) . i drag and drop my file in the movies folder but even before creating textures and material with my video i launch simply the video and when the media Windows open i don’t see anything, my screen is black (however my cursor works !!)… and it display “stopped” on the top . after any buttons works and i need to close Windows.

please help i don’t understand why !!!