I swear I saw flag.txt in the video, but now it’s ...

I can’t solve the flag from here because the YouTube fetch is throttled, and search didn’t surface cached copies of that video ID. (Invalid URL)

Best next steps for this OSINT challenge:

bash
yt-dlp --write-info-json --write-thumbnail --write-comments --write-auto-subs \
  "https://www.youtube.com/watch?v=65wwer7yXLg"

Then check:

bash
grep -R "v1t{" .
grep -R "flag.txt" .
exiftool *
strings *

Also try old thumbnail/frame sources:

text
https://img.youtube.com/vi/65wwer7yXLg/maxresdefault.jpg
https://web.archive.org/web/*/https://www.youtube.com/watch?v=65wwer7yXLg
https://web.archive.org/web/*/https://img.youtube.com/vi/65wwer7yXLg/*

Upload the video file, thumbnail, or a screenshot of the redacted frame and I’ll inspect it directly.