Frame delay running through a computer is going to be hell, and you're going to have to have a beefy computer to even keep up. Live video is big, lots of pixels coming very fast.
Expect a 10-20 frame delay.
How is a camera feed through a computer any brighter than a direct camera feed?
FSR makes good stuff, here in the USA even.
I presume you're going the camcorder route rather than the television camera route. It's a shame they don't make studio kits for the cheap camcorders. A studio kit will make your life much much easier.
What I would do is look for a good deal on a low-end TV camera, like Panasonic's F250. They're usually available in the sub-250 range on Ebay, sometimes with all or part of a studio kit even. Presuming a 12X
lens (most common) with no extender will do. Goodness, the lenses on my cameras (and they're only Fuji 12Xs) are larger than most camcorders these days.
Is the camera going to have a locked-down shot, or will it be moving?