I use screen shot (thumbnail) on Display Menu
on Windows Player, it can show video on screen shot.
but, on Android Player, it loss video area on screen shot.
I think, this problem from different video player module between windows and android.
Video is hardware accelerated on Android (as most Android hardware isn’t powerful enough to play back video with the main CPU) so on a screenshot video will appear as a black rectangle.
I should add that we do have this down as an improvement request - but it requires some complex changes into the way we show video, so it will take some time.