I remember that as a teenager I did observe that in some cases, I was able to see partial teletext pages from VHS tapes recorded from TV (like a few characters

I remember that as a teenager I did observe that in some cases, I was able to see partial teletext pages from VHS tapes recorded from TV (like a few characters of the date/time in the top row that did make some sense). Now, seeing that it's actually possible to recover that data... I find it's too bad that we threw away all those tapes because nobody was watching them any more.