I think maybe stinkinbadgers’ point was that it’s not surprising that such heroic measures have to used to recover teletext from VHS, because to look at the VHS standard (as opposed to SVHS) you’d be surprised to see it had captured even a tiny crappy bit of the space where teletext was stored.
Sort of like zooming in on someone’s eyeball in a photograph and maybe getting a glimpse of what the photographer looked like. Theoretically maybe possible, especially if you had a bunch of frames in quick succession, but probably requiring enormous amounts of processor-intensive manipulation to even come close.
