Video or a still photo in the ad?

A photo, if the offer is the dish and it is clear in one image. A short video, if what you are selling is the room and in the first seconds the dish is visible, not a shot of hands with no food. Watch the video without sound: is it clear what is eaten? The video is atmosphere and what is on the dish cannot be seen. The photo or the video that was chosen, with the dish recognisable.