If VEE needs to be connected to GND then why isnt it connected inside the chip?

I dont really want to use any extra components (especially a video amp) so ill have a look at that link. I dont think it would matter too much because these are only little £12 cameras and are black and white but i was planning to have my PC and skybox plug into this circuit too and i do want the best possible picture for those.

Im sure i saw "low resistance" in the datasheet somewhere but maybe dropping 20% is classed as "low". I suppose i could always put a resistor in the middle of a wire to test how the picture would look before buying any chips. Im sure the datasheet would specify how much resistance there is