videoing really isn't difficult, you can get a fabulous video camera for £300 thesedays- and keep it after the wedding! I am sure you will find many willing volunteers, mostly male, that fancy themselves as the next spielberg.
editing suites are also really cheap now as long as you have a computer that can cope with the file size you're laughing AND you have a new video camera
I am eyeing up these from john lewis, am going to buy it as a christmas present for my dad / brothers and indicate on the sly that it is on the condition they video the wedding lol:
http://www.johnlewis.com/230562675/Product.aspx
http://www.johnlewis.com/230599745/Product.aspx
(not sure what you're going to do with a 70* optical zoom! that's bonkers)
keep the extra £700 and put it toward a photographer. personally I think they're worth far more and will get looked at a hundred times more.
[Modified by: aliceelizabeth on July 07, 2009 03:51 PM]