There is a WNBR video on Youtube where the uploader "pinked out" the naughty bits "in accordance with Youtube nudity policy".
There were some other videos of a tattoo artist that have since been deleted by Youtube for "excessive nudity".
"Does Flickr allow pictures with nudity?
I keep trying to upload my art to Photobucket, and the next day they all say "This image or video violated our terms of use" because they contain nudity. Flickr seems more about art and photography and less about graphics for myspace (etc) than Photobucket is, I was just wondering if photos that have nudity in... show more"
The "mods" on Youtube and Flickr seem to apply their policy on a very subjective basis. There are no black line rules. Maybe "obscene", "porn", "sexual", etc. are in the eyes of the beholder. The one I can't figure out is what they mean by "excessive nudity".