i know nothing about copyright law either, but I too see these same images everywhere and I would imagine the worst that would happen is you eventually get asked to take it down, which is probably a one in a thousand chance, or less. I never studied the Digital Millennium Copyright Act either but maybe if someone were concerned they would even have to issue a take-down notice first? I wouldn't imagine that anything major bad could happen except in situations where maybe someone takes a Getty or other commercial image and then crops off the copyright watermark, and even then I have to wonder what's the worst that could happen for a project like this.
Looking forward to hearing the first episode!

