Thanks crowd! We now know the source: https://theshovel.com.au/2021/10/26/man-announces-he-will-quit-drinking-by-2050/
@ernie IMO he's gaming the algorithm.
(1) He tells folk to watch all of the video before they complain, and watch time is surely a huge factor in whether YT treats a video as worth showing others.
(2) He repeatedly asks the audience to comment on his video. User engagement is likely another factor boosting your position.
(3) The thumbnail. Don't worry viewer, you aren't getting older, it's the world that's changing!