Modulating VCRs?

[CoogarXR]

I know I have had problems back in the day, connecting a cheap-o Apex DVD player to a cheap-o Symphonic VCR at my mother-in-law's house. When you would play the DVD through the VCR, using it as a modulator, the picture would be scrambled on certain copy-protected discs. I assumed it was a copy protection feature anyway, heh.

I just ended up giving her an external modulator and a coax A/B switch.

I assumed all VCRs did that. I am watching this thread now out of curiosity, hehe. I learn something new every day.