If you have a VCR that has two inputs and you can switch between them, that'll work, too, but again, I don't know anything about what it might do to the quality of the signal.

Remember that if you send a DVD player's video-out into the video-in of a VCR, it will be macrovision protected. The picture will waver between dim and bright.

This counts for S-video and composite video, but not for RF output, IIRC.