The mystery pair were caught in the throes of passion by cameramen filming a television commercial in Great Windmill Street this week. A source at production firm MJV said: "When the couple finished everyone clapped. The pair just laughed and waved. The film crew later sent the second clip, showing a brunette and her lover on the roof of the Windmill Theatre, to their friends for a joke.

Could this be one of the most extreme and controversial videos ever to be uploaded onto YouTube? The two-minute clip shows full penetration, filmed from inside the vagina and the tip of the penis. YouTube viewers also see explicit shots of the male orgasm. It appears the sexually-explicit video is allowed to appear on the video sharing website because it is categorised as "educational", rather than pornographic. But the shocking footage has been branded "porn" by YouTube viewers, who took to the comments section beneath the online video.

The paparazzi clip of Cicarelli, who was once engaged to Brazil and Real Madrid striker Ronaldo, first appeared on YouTube's Brazilian server on September 18 , only to be removed and reappear at a later date. Rubens Decousseau Tilkian, lawyer for Malzoni, said: "The internet is democratic and has to be defended, but this struggle is to have some level of control to avoid the violations of people's fundamental rights, like privacy and intimacy. The clip has now been removed from YouTube's Brazilian and US servers, but it is understood that it frequently appears via YouTube's other servers around the world.

How do I report a registered sex offender that is using YouTube to communicate with minors? I have encountered a registered sex offender by the username Valis This user was exposed by another user and showed his true colors and gave us a warning about Valis It is of my knowledge that registered sex offenders are barred from sites like Youtube, Facebook, Twitter, and otheres were many minors congregate, posing them as possible targets.