I think the reason for this is that audiotube uses the python module under /usr/lib/python3.14/site-packages/yt_dlp/. The yt-dlp-nightly-bin however, as the name suggests, installs only the executable yt-dlp to /usr/bin. If this should be right, then there is no fix for it. This is actually an error in the yt-dlp-nightly-bin in that it claims to provide yt-dlp such that the audiotube package thinks its dependencies would be fulfilled but actually they are not.
Since you want to use yt-dlp together with audiotube, the solution of the related thread won’t work for you. However, you could perhaps install yt-dlp from the unstable branch. (Remove the AUR package first.)
Thx for the explanation! I reverted to the yt-dlp in the extra repository. I’m now trying ytDownloader as alternative (thx Manjaro for the hint! ;-), until yt-dlp gets updated either in Manjaro extra or in AUR. I can report here that ytDownloader sort of works, but I had to change my VPN location. Audiotube instead, even with the new location, still does not work. I do not think I’ll use ytDownloader as standard for me, I do not want to download, just stream …
Thx @Jofi! I just tried the pacman -U, now audiotube works again
Mod edit:Consecutive posts merged, @mention added..