The Saturn V and LM schematics NASA doesn't own. They are owned by the respective manufacturer of those vehicles. While paper copies likely don't exist anymore they should all be archived on microfiche. But neither vehicle would meet today's safety standards. And IIRC they used some manufacturing techniques to make some parts that don't exist anymore either because better techniques replaced them or they have become automated or both.
As for the Apollo 11 recordings. Those were all backed up on other media. The video was never separate but piggybacked on the telemetry tapes (Large reel-to-reel tapes bigger than a dinner plate that each lasted less than an hour). They were likely written over when Memorex (the manufacturer of the tapes) had a shortage in the years that followed and they were faced with the decision to not collect incoming data from other projects or write over tapes they had (and may not have fully cataloged) but had backed up on other media. Nothing was ultimately lost. We have copies of all the video and telemetry.
The video was indeed separated, it had its own signal and frame format specially made for it. telemetry data was recorded on other reels.
In July 1969, three tracking stations received the TV signals of the historic Apollo 11 EVA.
They were the DSN 64 metre antenna at Goldstone, California, the MSFN 26 metre antenna at Honeysuckle Creek, Australia, and the 64 metre CSIRO Parkes Radio Telescope in Australia.
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The TV signals transmitted from the Moon
were high quality Slow-Scan TV (SSTV).
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When received on Earth, they were scan-converted to the commercial TV standards before being broadcast to the public at large.
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The scan-converted TV signals, from each of the three stations, were then relayed via landline, microwave relays and geostationary satellite to Houston before being released to the TV networks for general broadcast.
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The signal, as sent from the Moon, was initially degraded by the scan-conversion process, producing lower resolution images and introducing additional signal noise. Also, the transmission of the scan-converted TV to
Houston caused additional signal degradation.
This lower quality TV is currently all that is available of the Apollo 11 EVA.
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The SSTV was of superior quality to the scan-converted pictures viewed by the worldThe best possible images were only viewed at the receiving stations and at Houston.
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As the raw SSTV signals were received at the three tracking stations, they were recorded onto 1-inch magnetic data tapes.
Following the EVA, procedures required that these tapes be shipped to the Goddard Space Flight Center (GSFC).
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In 1970, the tapes were placed in the US
National Archives in Accession #69A4099. By
1984, all but two of the over 700 boxes of Apollo era magnetic tapes placed in the
Accession, were removed and returned to the
GSFC for permanent retention. These tapes
are now missing.
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These missing data tapes include the raw Apollo11 SSTV tapes. For the past several years,
a search for these tapes has been undertaken by several former Apollo 11 personnel.
To date, no Apollo 11 SSTV tapes have been found.
Today we only have low dynamic range, blurry and noisy footage. Even after recent reconstructions it will never look as good as the raw SSTV.