Whenever I play a video in facebook, the video crops as to present the upper left corner, so I only see the upper left quadrant of the video. If I click to make the video larger, then I see all the quadrants of the video. The upper left quadrant appears to remain the same size when the video is in full screen mode. If I click to bring the video back down to a smaller size, then again, I can only see the upper left quadrant. Please help. Thanks