With each successful search, Alex felt a thrill. He was not just a voyeur; he was a cartographer of the unseen. He mapped the city's invisible arteries, the streams of data that flowed silently, carrying with them the lives of millions. The feeds varied: a kindergarten playground, children laughing and playing, oblivious to the digital eyes upon them; a financial district, where the hustle and bustle of businessmen and women rushing to meetings was captured in crystal-clear Motion JPEG; and back alleys, dimly lit, where only the flickering of a stray cat's tail broke the monotony of the grey walls.