The Casio EX-ZR300 supports a maximum video resolution of 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 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 across all comparable spec digital cameras that have been available for around the same time as the EX-ZR300.
Across comparable types of camera the worst supported video resolution is 320 x 240 pixels.