I also tried to archive https://www.youtube.com/watch?v=iAtyuG5GxLg but YouTube blocked the download with a sign-in bot check, so that one still needs cookies or another working capture path.
One thing I noticed: kind 30041 is already defined as "Curated Publication Content" in NKBIP-01, and all 30041 events on relays right now are article/chapter content, not web archives. fiatjaf's archiver extension uses kind 4554.
Would love your input on whether we should pick a dedicated kind for replaceable archive announcements instead. Feel free to comment on the issue.