Forgive me if this is well known but there was a thing called slow scan television - purely analog first introduced in 1957 - 1958 https://en.wikipedia.org/wiki

Forgive me if this is well known but there was a thing called slow scan television - purely analog first introduced in 1957 - 1958 https://en.wikipedia.org/wiki/Slow-scan_television https://en.wikipedia.org/wiki/Slow-scan_television. This is related to Videotelephony "The concept of videotelephony was first conceived in the late 1870s" https://en.wikipedia.org/wiki/Videotelephony https://en.wikipedia.org/wiki/Videotelephony