This will be the biggest broadcast that Youtube will do, with 2 BILLION expected to watch online via their mobile, laptop, desktop, the web, etc.

Youtube plans to live stream the wedding of Britain’s Prince William and Kate Middleton on April 29. Youtube will run for four hours beginning 10 a.m. BST (9:00 a.m. GMT, 2:00 a.m. PT, 5:00 a.m. ET). It will cover the balcony appearance and the aircraft ceremony.

Google already outlined with 3D Street View the route to and from Westminster Abbey.

The live stream, hosted on the official Royal Channel, will run for four hours beginning at 10 a.m. BST (9:00 a.m. GMT, 2:00 a.m. PT, 5:00 a.m. ET). It will follow the pair’s journey to and from Westminister Abbey (which Google has already outlined with 3D Street View), the Wedding Service, balcony appearance and aircraft ceremony.