The highest video resolution supported by the Nikon D5500 is 1920 x 1080 pixels. That's over six times the video resolution of a 640 x 480 pixels digital camera, which is the most frequently found video resolution supported by comparable spec digital cameras that have been on the market for more than two years. In addition, this Nikon digital camera support a video resolutions of 640 x 424 pixels and 1280 x 720 pixels. A video resolution of 1920 x 1080 pixels is equivalent to Full HD video. You will require a Full HD TV or better to appreciate this level of detail.
A 1920 x 1080 pixels video resolutions is actually the best supported video resolution amongst all high megapixel cameras that were released around the same time as this digital camera.
Amongst comparable types of camera the worst supported video resolution is 320 x 240 pixels.