When I was a kid I identified old TV shows because thet were black and white.

https://lemmy.world/post/2558472

When I was a kid I identified old TV shows because thet were black and white. - Lemmy.world

These days, kids identify them by the aspect ratio.

I do by audio quality. We currently live in the age of badly understandable dialogues.
I think most people have given up and use subtitles on all the time.