Canon 80d video shooting has the following formats to choose from, because it can only be selected and cannot be changed, so it cannot be set to shoot videos of 4 to 3 sizes.

MOV format:

1920× 1080 (full HD): 29.97p/25p/23.98p.

MP4 format:

1920× 1080 (full HD): 59.94p/50p/29.97p/25p/23.98p.

1280×720 (HD): 59.94p/50p/29.97p/25p