I just managed to see part of this transmission. The website of the town above has more information about when transmissions occur, as well as photographs etc.
I have copied below, a piece of text from the following website about this particular festival/event/hommage. Spain Info Website
Here is the information:
Rocío pilgrimage (Huelva)
Over one million people and 85 fraternities participate in this Pilgrimage, whose destination is the sanctuary of the Virgin of Rocio, on the outskirts of this town.
This fiesta has been celebrated since the 17th century. However, legend has it that the image of the Virgin was hidden during the Muslim occupation until it was found amongst the thistles in the 15th century by a hunter from Villamanrique de la Condesa. The oldest fraternity comes from this town.
It consists of a pilgrimage to the sanctuary of the Blanca Paloma (White Dove) in Almonte (Huelva) by fraternities from all over western Andalusia. The Rocio fraternities set out on different dates to meet up in the town of the Rocio at midday on the Saturday before Pentecost. The most typical tradition is to make the trip on horseback, by cart or on foot through the salt marshes, and sleeping under the stars. Upon arriving at Almonte, camp is set up while waiting for the other Fraternities to arrive. On Saturday, each one parades by displaying its 'simpecado' (insignia of the fraternities dedicated to the Virgin Mary), the cart with the standard and the reproduction of the Virgin. No one sleeps on Sunday night in the hope of being able to enter the temple and parade the Virgin. The 'salto' (jump) is the moment of greatest fervour as the people of Almonte invade the hermitage, jump the gates and parade the Virgin through their village.
Dates: 5/12/2005 - 5/16/2005
On the Villamanrique website here
, you can view videos (on the right of the page) about Rocio 2004 and Rocio 2005.
If you click on the links (videocams) in the centre of the page, this will allow you to view live transmissions. Please note that these only happen at certain times, and at other times, the webcam may be closed.
At the moment (1220 CET) there is some action.
If your Spanish is up to it then you will find lots of information about Rocio 2005 at http://www.ayto-villamanrique.es/rocio/index2.htm
For those of you who wish to more about the town of Villamanrique, please click on this link: http://www.ayto-villamanrique.es/
A more historical treatment of the Romeria del Rocio is given at: http://www.sevillaweb.info/uk/ociouk/rociouk/
If anyone has any other information, plese post.