He could have the best VHS records out there and the best tapes, but the source material being recorded would be painfully limited, as would the recordings.
I would have expected Scorsese to have requested, threatened, manipulated, bribed, and so on to obtain film reels.
This would not be possible for a lot of the content but surely for quite a few.
He could do the same for original VHS cassettes with the movies (like you would find in a rental store. Just unwatched ones.
Also that he would have people to buy DVD version when (if) they came out. Still if a DVD version was released that would indicate that the source film was available and Scorsese could have a copy of that instead.