I remember for a short time Computer Chronicle would have a segment where they flashed what looked like static on the screen to transmit programs. You had to ha

I remember for a short time Computer Chronicle would have a segment where they flashed what looked like static on the screen to transmit programs. You had to have some device to capture it and send it to a computer. Edit: It looks like it was the followup to Computer Chronicles: Net Cafe https://cyborganthropology.com/TV_Modem https://cyborganthropology.com/TV_Modem