The highest video resolution supported by the Coolpix P310 is 1920 x 1080 pixels. That's over six times the video resolution of the most common video resolution of 640 x 480 pixels (which is also supported by this Nikon camera). In addition, this Nikon digital camera support a video resolution of 960 x 540 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.
This digital camera's video resolution (1920 x 1080 pixels) is actually the best supported video resolution amongst all cameras of this spec and age.
A 320 x 240 pixels video resolution is the worst supported video resolution amongst similar types of digital camera.