I just discovered, thanks to nostr:npub1p8rwr6a7f2m3q4mqk825ezac9ha75x3n2uew78kgnvznkxwrrhwq6vu0er from The Wayback Machine that there is a button, "About this capture", that actually details the 'files from the future' in a Wayback copy of a webpage. I had never clicked that before! For my Cybercultural post today, I had manually inspected the source code to see which files were from the future. But this button is very useful going forward.

https://files.mastodon.social/media_attachments/files/111/177/694/459/021/942/original/c85b571fd89c7e2c.png