Probably more important than the video camera is a) the editing package that can work with it, and b) the guy doing the videography.
I like Sony products myself, 'cause I'm an Apple guy and Apple and Sony work well together. iMovie for the Mac is probably the most intuitive editing software package you'll ever see; I've got years of TV behind me, and I've got Final Cut still in the box -- that I'll probably never use because of all the effort it requires to get up to speed.
But the most important thing is that your shooter knows when to do a 3/4 shot and when to do a close-up. When and how to do reaction shots that you can edit into a promo tape and the rule of thirds to make you look good in the frame. Garbage in, garbage out. If your tape going in to the edit package looks like crap, there's not a whole lot you can do to make it better (There's some, but not a lot).
Oh, and of course, when not to cut away, so you don't look like David Blaine.