I'm guessing sometime between now and next few weeks. With things like this there's usually a few last recordings with some audio to clean up etc etc.

A substantial number from PyCon US 2023 went out on 02-Jun-2023 (ie exactly a year ago today).

I was wondering the same thing. In fact when I saw this post (the top-level) about PyCon 2024 I went and re-checked to see if they had published any videos.

Like you I see "144 unavailable videos are hidden" and only 9 videos available to watch.

I'm looking forward to watching some of the content when they do publish :)