[CMB_polarization]

There were two Viking landers (not rovers) operating at the time and neither of them sent down live video.

[Vermont Lt]

I thought was the case. Not a lot of video streaming from Mars in ‘76.

[skeptoid]

There were two Viking landers (not rovers) operating at the time

You prompted me to look up List of missions to Mars

. . . . .. very interesting comparing Soviet and American missions!