The highest video resolution supported by the DSC-H100 is 1920 x 1080 pixels. That's over two times the video resolution of a 1280 x 720 pixels digital camera, which is the most common video resolution supported by digital cameras of this age and type. 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.
A 1920 x 1080 pixels video resolution is in fact the best supported video resolution amongst all comparable spec cameras that have been on the market for around the same time as the DSC-H100.
A 320 x 240 pixels video resolution is the worst supported video resolution amongst similar types of digital camera.