resolution property

The width and height of thumbnail files in pixels, in the format WidthxHeight, where both values are even integers. The values cannot exceed the width and height that you specified in the Video:Resolution object. (To better control resolution and aspect ratio of thumbnails, we recommend that you use the thumbnail values maxWidth, maxHeight, sizingPolicy, and paddingPolicy instead of resolution and aspectRatio. The two groups of settings are mutually exclusive. Do not use them together)