The highest video resolution supported by the Casio EX-ZR20 is 1920 x 1080 pixels. That's over six times the video resolution of the most frequently found video resolutions of 640 x 480 pixels (which is also supported by this camera). In addition, this Casio digital camera supports a video resolutions of 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.
This camera's video resolution (1920 x 1080 pixels) is in fact the best supported video resolution amongst all digital cameras of a similar type and age to this camera.
A 320 x 120 pixels video resolutions is the worst supported video resolution amongst similar types of camera.
What does "video resolutions" mean?