The media that is used on a Facebook placement. The media specified here replaces the media orginally defined in the ad creative when the ad displays in an associated placement.
The video captions that should apply to the platform specific video
A JSON object defining crop dimensions for the image specified. See Image Crops for more details.
The image used for the platform specific media.
The URL of the image used for the platform specific media.
The ID of the video used for the platform specific media.