I remember those days. You had snow--but no pixileation..that's worse to me.
Well, you'll get a little bit of both in this video: the upload is a tad "pixely"...but it definitely will give you fine folks a taste of the kinds of picture we had back in out dim and distant childhoods!
I grew up with UHF and VHF and none of these simulations really capture the look. They also exaggerate how often the picture was that noisy/snowy. And they miss the "waver" when the horizontal hold wasn't set juuuust right.