The highest video resolution supported by the Stylus TG-3 is 1920 x 1080 pixels. That's over two times the video resolution of the most common video resolutions of 1280 x 720 pixels (which is also supported by this Olympus camera). 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 across all waterproof cameras that have been around for around the same time as the Stylus TG-3.
The worst supported video resolution across comparable types of digital camera is 320 x 240 pixels.