When adding a video to a slide, is it possible to have an image from the video display in the video player, rather than a blank black screen?

I frequently add Event Videos to slides.  The videos do not play automatically; typically the presenter will speak first and then start the video.  When a slide with a video is accessed (and before the presenter plays the video), I would like to have the video player showing a frame from the video, rather than just a solid black  screen.  Is this possible? This is purely for aesthetic reasons, so that there is an image on the screen as the […]