SECAM was pretty crazy because it required a delay line: a memory that would hold the previous scanline so it can be combined with the current one.

Without digital circuits, the delay line was a piece of glass. You’d convert the video signal to a sound wave, send it through the glass, and (hopefully) get it back exactly 64 us later so it aligns with the next scanline.

Here’s a picture: https://www.eevblog.com/forum/projects/glass-ultrasonic-dela...

Very common for this format. It looks and sounds like something of substance on the surface, but ultimately it's just going through the motions and droning on to fill 10 minutes. Like a high-schooler with an assignment to give a presentation on some topic, but with higher production quality.

It does not have to be coherent, because it's entertainment, closer to a sitcom than educuation. If you think about it too hard you'll ruin it for yourself.

Before you blame YouTube and AI though, have a look at what documentaries on TV are and used to be like. With few exceptions they're not much better.

I disagree. I think the video clearly described the challenge, somewhere in the middle of the video, as sending TV signals that both BW and color TV sets could decode, and went on to explain how that challenge was solved by "inventing" separate Luma and Chroma signals. Did I miss something?

Thanks for the Tintin reference! I immediately knew what you mentioned as that panel flashed in my mind.

I don't know what it is about the Tintin comics, but for many of the fans, the panels are so strongly memorable even after so many years, is quite amazing.

farnovision.com ?