I think it might just be autocorrect translating "AAC" into "access".
'Access' copies are versions of originals intended for viewing, in contrast to the original ('preservation') video which may be impractically large to use.
(At least that is how the term is used by collections librarians. Even there terminology may vary)
You use "access" several times but I don't know what you mean by it. I'm going to guess that is some non-english usage slipping in. Nothing else to complain about at this time. [EDIT] I should say "is used" and "they mean" because I don't know if the author is also the poster.