How to Set start time in a YouTube Video

It was not start the video at a specified time. The user had to wait till the 5th minute and 33rd second then watch the video. But now with a small change in the URL will do the trick.
Example:-
http://www.youtube.com/watch?v=qazwsx you can change it to
http://www.youtube.com/watch?v=qazwsx#t=5m33s
and that will start the video at 5min 33 sec. This is a very small tweak but very very useful.
Let’s examine closely what extra # we typed does,
t= time, m=minutes, s=seconds. So if I type #t=5m33s it means 5th minute and 33rd second; the video will start exactly at the time specified.