To watch a age restricted YouTube Video follow the steps given below -
1. Go to the age restricted YouTube Video. Let us take an example - http://www.youtube.com/watch?v=vhVcc8DfA0M
2. Replace "watch?v=" with "v/" in the URL of video. Moving with our example, the URL of our video will be http://www.youtube.com/v/vhVcc8DfA0M
3. Hit enter and watch the video.
If you have any query then feel free to comment.