This video is uploaded by Experience Oz
I came to know about this adventurous climb when I visited bing.com today. Its home page is saying the entire story about Sydney Harbour Bridge climb. This idea was first introduced in 1989, but it took nearly 10 years to be sanctioned by state and local government bodies. It was officially opened on 1st October, 1998 after discussing on several aspects.
Before government sanction, a few adventurers used to climb the bridge illegally, but now it is not possible. A tourism company is established to help bridge climbers reach the top of the bridge and it takes 3 hours in total with preparation time. From the top of the Sydney Harbour Bridge, you can have a complete view of Sydney. But you really need to be very brave; otherwise it can be a great health issue.
Source: https://en.wikipedia.org/wiki/BridgeClimb_Sydney