The Story of Marion Stokes, Who Single-Handedly Taped 35 Years Of TV News
fastcompany.com
fastcompany.com
I imagine when she told her friends what she was doing it would be akin to someone today saying they are trying to record everything on the internet. Back then probably pretty crazy. Now? Maybe still crazy!
Many things have a copyright restriction on reproduction. These happen automatically upon creation. The LoC does not get a copy of these. (For example, it doesn't get a copy of internal proprietary company documentation, even though those are covered under copyright.)
There are additional legal advantages to registering a copyright. These are part of the public record, and the LoC may have up to two copies of these registered documents.
However, it can decide to not keep any copies. Quoting from http://www.loc.gov/loc/lcib/9709/acquire.html:
The Library usually rejects individual company sales manuals, advertisements, coloring books, elementary and high school textbooks (except in U.S. history), instructors' manuals, student workbooks and self-published books except for genealogies, local histories and other publications of special interest. ... The Library collects materials in all subjects, except technical agriculture and clinical medicine, which are kept by the National Agricultural Library and the National Library of Medicine.
So, your text is more correctly written as "The Library of Congress may have up to two copies of every movie or other thing with a registered copyright, but due to various cut-outs that just is not so."
Thus, there's no reason to assume this stuff is archived anywhere.
If the documentation is non-creative then that would not be covered under copyright but could still be a trade secret.
Kudos to Marion for doing this, I think this archive will be regarded as invaluable years from now.
(Cooincidentally it looks like archive.org has taken over hosting the now-defunct itconversations podcasts.)