Actually the original signal was low frame rate, high resolution. So it's more than your description says. A special video monitor with long afterglow phosphoru

Actually the original signal was low frame rate, high resolution. So it's more than your description says. A special video monitor with long afterglow phosphorus was recorded by an NTSC camera. Imagine what modern signal processing could have done with that original slow scan signal recorded in raw to these tapes. Alas, it's lost like tears in the rain.