You would probably have to store a still image—perhaps a screenshot from the video—in a separate container field.
Ok. But I´ll find a way to display it automaticaly in the same field than the video. It´s more profesional and it takes less screen space.
OK, my mistake; I assumed you meant a still of your choosing. What I now think you are looking for depends on the field settings in the Data Formatting Inspector—see screenshot 1 below.
Screenshot 2 shows the field in browse mode when the field is set to optimise for images, while screenshot 3 shows its appearance when set to optimise for interactive content (as shown in 1), which I think is what you are looking for.
OK. My mistake also. You are all right. Do yo know if it is al posible to display in the same way in filemaker go?