I’m confused. It has been stated that the source is VHS, but you appear to be saying that the quality you think you can see in places implies that it must actually be from something better?
Remember also that the VHS would have been 576i if recorded in Australia, not 480i (which it would be in NTSC countries like the USA). VHS does not automatically imply 480 everywhere, and describes the number of horizontal lines making up the picture, which would always match between what is broadcast and what ends on VHS in the same country.