Maybe, but I have had the VCR for several years so far.
I understand 95% of it and I do far more with it than any consumer VCR can do. I even think that stunt I've worked out would surprise the folks that designed it.
But that final 5% has eluded me so far. I've been using home theatre equipment for a long time. But I don't know what the DC component of a chroma signal is. Nor a CTL signal. And I especially don't understand why I would want to superimpose anything on my chroma signal. Oh well....