Sometimes in you tube videos you might find something in a video which is intresting and share it with your friends. But when you share the URL with them they need to wait till the movie dowloads and then drag and find where it is. You can at the most tell them whats the exact time slot from where they need to watch.
But wouldn’t be it great if you can set this time slot withing the you be vido link and it plays from there ? Yes thats possible and all you need is to add #tXXmXXs e.g. http://uk.youtube.com/watch?v=O_PuhJ8Akuw#t=0m21s Enjoy!!!