The Canon 1D C Body supports a maximum video resolution of 4096 x 2160 pixels. That's over seventeen times the video resolution of the most common video resolutions of 960 x 540 pixels. In addition, this camera support video resolutions of 640 x 480 pixels and 1280 x 720 pixels and 1920 x 1080 pixels.
A 4096 x 2160 pixels video resolutions is actually the best supported video resolution across all digital cameras of a comparable spec and age to this digital camera.
The worst supported video resolution amongst comparable types of camera is 320 x 120 pixels.