The duration of an Amazon Sponsored Brands video ad should be 6-45 seconds. The video should have an aspect ratio of 16:9, and one of the following dimensions: 1280 x 720px, 1920 x 1080px or 3840 x 2160px. All on-screen text must be in 30-point font and be easily readable. Videos must be in the language of the locale in which it is displayed.