[edited from support email]
Whenever there is a video file in a trial, there seems to be a short black flash before the video displays. This flash does not occur when bitmaps are displayed. I couldn't find troubleshooting tips for this issue, the only item on 'flashing' relates to inter-trial breaks. If there was no way to eliminate it completely, could I at least make the flash match my light grey background colour? Do you have any indication as to what it means that the black flash seems to be associated with playing the video file itself?