I don't think it will be possible, short of taking pictures of my monitor. The video rolls very badly. I even tried straight in through the RF inputs, and the image still skews badly even when it doesn't roll.

I'm pretty sure it's an early, overly aggressive anti-copy signal similar to Macrovision, but I don't have anything handy to deal with it. Being a Laserdisc guy, I never had that many prerecorded tapes to begin with.

I'm confident enough now to say the green of the DC titles is "correct" based on current evidence. So this wasn't a total dead end! Perhaps this fellow with the UK tapes would be able to tell us what color the credits are...