Ever since I was a kid in the 1990s, I've been wondering about this. I have never been able to verify/test it in a conclusive manner.
It may be almost forgotten now, but in those days, each TV channel (at least in Sweden) had a "hidden interface" in the shape of "Text-TV" ("Teletext") which would show a fullscreen "terminal"-style dump of information, allowing the user to "surf" this primitive "Internet for poor people" by entering numbers such as "123". You then had to wait a certain amount of time and then could see that "page".
Obviously, this was accomplished by some sort of hidden metadata being sent along with the video/audio data, and the waiting was necessary because it only sent some "pages" of data at a time due to bandwidth limitations.
My question is: if you recorded such a broadcast onto a VHS tape with a normal VCR, then later looked at the video tape, would the TV allow you to enter and "surf around" the Teletext, just as if it had been "live"?
Or was this data scrapped and never made it onto the VHS tape? Or was it included, but some other reason made it impossible to (easily) "surf" it later?