Suggest types of digital archive sites where such files are often found?

The year was 2017, and encrypted forums were buzzing. A user named "ArchivoFugaz" had dropped a cryptic post on a private file-sharing site. He claimed to have salvaged a 4K, high-bitrate recording of a legendary, never-broadcast, 1990s documentary about an illegal, underground movement aimed at technological freedom.

The file was heavily encrypted, and the password was embedded within the digital signature of the subsequent part, part02 . The problem was, part02 seemed to have vanished. A panicked digital treasure hunt began.