Here's the real rub: the videos have already been pirated at full quality, and are available online for free. They're doing a poor job of defending something that has already been breached.

That all said, camcorders don't get you anywhere: the goal isn't ripping the video, it's ripping the high quality video. DRM can theoretically defend against that, but you'd need to control the whole stack, incl. hardware, incl. the monitor and speakers.