The video-sharing website YouTube has banned access to 12 videos that are said to insult Prophet Muhammad following a Turkish court decision on Monday, according to court officials.The verdict of the magistrates' court of Golbasi in Ankara was submitted to YouTube by the local access provider in Turkey and access to the 12 videos was blocked in the country.Evaluating the application of the public prosecutor's office, the magistrates' court had decided that access to YouTube would have been completely barred had the 12 videos not been blocked.