In the early days of stock exchanges the video displays were all driven using analogue video delivered over coax cable. However the video signal was merely there to deliver a blank screen, the actual data was done using TELETEXT decoder chipsets in the TV sets, with each page being assigned to different types of display. This gave a very robust data transfer, yet the actual hardware itself was simple enough and available off the shelf, and you could select any page at any time, and it would come up in sequence. The only change they did to the text standard was to use the entire frame of video to handle text, not just the top 3 lines of the screen normally blanked by the retrace circuit, so that they could transmit the entire 1000 page magazine very rapidly.
These days I doubt you can find a TV set that actually still has a text decoder on the analogue video inputs any more, but there were both Phillips, Nokia and ITT chipsets that implemented this in a set, with various levels of how cooking hot they ran, and how often they would fail in use.