Anything reaching those kind of numbers is probably a music video or some sort of nursery rhyme set to music. Youtube is mostly a music service.

Beyond that, there's a grammarly ad that hit over 500 million views, wonder how much they spent on that and a lot of random memes. It's real difficult to find the most viewed real non-music, non-kids, non-ad video. Probably still Charlie Bit my Finger (again). Except Mr Beast, not many others regularly topping 100M.