Many U.S. government agencies and military branches have public YouTube pages. That is no secret. However, within these channels, lies a hidden treasure trove of PRIVATE/UNLISTED videos NOT accessible by the general public.
Through the Freedom of Information Act, The Black Vault along with another researcher has tackled trying to get access to these videos listings. That researcher has donated the requests they did, along with the documents, to the archive below. However, they asked for their identifying information to be redacted.