Teletext was common in the UK. A few years after it was invented almost all TVs had an internal decoder. The BBC called it "Ceefax". It ended in the UK when analogue TV was switched off in 2013.
https://en.wikipedia.org/wiki/Ceefax
Sometimes fragments of teletext can be recovered from VHS recordings. Not reliable due to limited bandwidth.
Viewdata used related technology over phone lines:
https://en.wikipedia.org/wiki/Viewdata Used heavily by travel agents.
In France they used Minitel extensively in pre-internet days:
https://en.wikipedia.org/wiki/Minitel