The Nikon D500 supports a maximum video resolution of 3840 x 2160 pixels. That's over nine times the video resolution of the most frequently found video resolutions of 1280 x 720 pixels (which is also supported by this camera). In addition, this Nikon digital camera supports a video resolutions of 1920 x 1080 pixels. A video resolution of 3840 x 2160 pixels is equivalent to 4K Ultra HD video. This has four times the detail of Full HD video.
A 3840 x 2160 pixels video resolutions is actually the best supported video resolution amongst all latest digital cameras.
The worst supported video resolution across similar types of digital camera is 640 x 480 pixels.
What does "video resolutions" mean?