One interesting aspect of old NTSC sources is the wider colorspace. This was only changed in the 1990s:
https://en.wikipedia.org/wiki/NTSC#ColorimetryFor example the first seasons of Star Trek DS 9 use the old colorspace. This was not corrected for DVD release, even on the PAL versions. That why the colors look so unsaturated and off. We are viewing them on sRGB / EBU displays with a smaller color space!
https://color.viewsonic.com/asset-files/images/what-is-color-gamut-3.jpg
Very interesting and that explains observations I’ve made whilst watching the current DS9 airings on the Horror Channel. 😃
Well, of course things in the UK aren’t affected by it because they’re natively at that speed. So they’re out of the equation.
Much but not all.