Who is the destination of the intent? Is it your app or another app which runs then?
Usually a intent calls another app. Your app is in the background (your activity is paused)
So android will use a suiteable app and start it. Can you confirm that your activity is being paused after you start the intent? Put a log command in activity_pause to log it
I would guess YES; another app is running to show the video.
You can use the mediaplayer i believe to show the video in your app