The screen cut to black. Then, a live-action shot of a desk in a dark office. A man’s hand reached in, picked up a VHS tape labeled "S1 TEST – DO NOT ARCHIVE," and dropped it into a running paper shredder.

Because the Internet Archive is a public library that hosts user-uploaded content, the "exclusive" feature usually isn't official content from Nickelodeon, but rather

The term "exclusive" in this context usually refers to community-uploaded archives that preserve original broadcast elements or rare media. Original Broadcast Versions

The site also preserves rare digital "ephemera" related to the first season:

If you navigate to archive.org and search the exact string, you will find a specific item often titled "SpongeBob SquarePants - The Complete First Season (Uncompressed)." The "exclusive" nature comes from the .

Are you researching (like the "SpongeBoy" name change)?