well, as long as your camera is PAL, then just export them as is. if you're capturing analog video there is very little quality loss on export (so little you wont notice). if you're capturing DV (using firewire) then there is no quality loss at all.
There are quite a few video cameras that only have output capabilities and will not accept digital inputs. If you have one of these then you will not be able to put your videos back onto the camera tape.