The Exilim EX-ZR400 supports a maximum video resolution of 1920 x 1080 pixels. That's over six times the video resolution of a 640 x 480 pixels digital camera, which is the most common video resolution supported by compact cameras that are a comparable age to the Exilim EX-ZR400. 640 x 480 pixels is also supported by this digital camera. This Casio camera also 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 digital camera's video resolution (1920 x 1080 pixels) is in fact the best supported video resolution amongst all compact cameras that have been available for around the same time as the Exilim EX-ZR400.
A 320 x 240 pixels video resolutions is the worst supported video resolution across comparable types of digital camera.