This is why those user-submitted tubes can never fully feel secure on US soil.. how do you provide 2257 information for full length DVD scene that has no watermarks? Or better yet, how do you provide 2257 information on a video of something taboo that joe-blow uploaded from his moms basement. They may be exempt from responsibility around copyright infringement and illegal types of content due to it being user submitted but they cannot be exempt from 2257 because most tubes have preview thumbnail animations when you mouse-over them. Those images need documentation
I'm really surprised nobody has lost their asses yet due to this because there have been many user submitted tubes ran from US citizens...