Which of the following is a valid aspect ratio for a square video?

• A. 2:3
• B. 1:1
• C. 16:9
• D. 9:16

Answer: (B)

A square video has equal width and height, so the aspect ratio must be 1:1. That ratio yields a perfect square frame, matching the requirement of a square video. The other ratios produce non-square frames: 2:3 has height greater than width, 16:9 is a wide landscape, and 9:16 is a tall portrait.