When I look at my favorite'd videos on Youtube, a huge fraction of the ones from before 2010 are gone (example: https://i.ibb.co/31vb8nd/Screen-Shot-2021-02-14-at-2-31-56-P...). OTOH a lot of the things that I found funny in 2009 now seem cringy to me, so the gaps in the playlist save me from uncomfortable introspection.