yt-dlp is still alive, well and actively developed. It can now target abunch of different platforms.

For your education:

Pacman like many other package managers tries to minimize network queries, to do this you download a manifest of every package available and its installation instructions. -Sy downloads the latest manifest from all of your pacman repos, -u installs the packages whose “version” field changed between the old and new manifests.

These error messages show that the domain name the manifest had for your package was unavailable, this is why you should check for updates.

Resting your eyes means going back to sleep

Then I’d delete my old phone number account and start fresh… not exactly the best option but all things considered you might have too

Signal recently implemented “usernames” instead of phone numbers