Hi - we use transparent backgrounds to manage video overlays from Proclaim (we specify green to replace transparent on our vide output & key from that in the video switcher).
Sometimes we have to show portrait videos which seem to mandate a transparent background if used on a media slide. If we insert such a video onto a content slide, then specify the background, the video disappears! We don't have this problem when adding "Content/Foreground image".
So, how do we show a portrait video AND specify the background to be other than transparent?
Thanks - John