Wedding Music Video

Hey there. I have this wedding videographer Magic Flute Videos for my July 17th wedding and they are offering to do a music video for me.

This is the link to their demo: http://www.vimeo.com/12492118

I've just never hear of anyone else doing this. I think their stuff looks amazing, but I was wondering if anyone else has done one of these and has advice to give?

Thanks!