I have a database with brief (2-10 min) video clips stored externally in a container field shown in a portal. The container field is displayed as a popover that opens the video clip and allows it to be played by pressing the play button in Fielmaker's own internal video player. There is also a full-screen option that I had not yet tested until today. When I went full-screen, all buttons on the video player (play/pause, exit full screen, volume) stopped working, though they gave visual feedback (the play icon changed to the pause icon but the video did not stop playing). More worryingly, I could not get out of this full-screen arrangement. I had to force-quit Filemaker (for the first time that I can remember in 19 years of use). Any idea what could have happened? Running FM Pro 16 (I did not confirm whether it was the latest build) on a 2016 iMac running OS 10.12.latest (Sierra). Database is served over a network by FM Server 16.