Some dependencies are not satisfied with a package with the same name, but with a "provides" from a package with a different name.

example:
https://aur4.archlinux.org/packages/lib32-ffmpeg/
depends=("lib32-libx264")
is satisfied with
https://aur4.archlinux.org/packages/lib32-libx264-stable-git/
provides=("lib32-libx264")

The dependency "lib32-libx264" is linked to a search in the official repository:
https://www.archlinux.org/packages/?q=lib32-libx264
where it is not found (since there is no such package in the official repository).

For official packages we link all packages where a dependency is provided:
https://www.archlinux.org/packages/extra/x86_64/ffmpeg/
libx264.so=144-64 (libx264, libx264-10bit)

I would like if we do that on AUR 4, too.
Otherwise there is no connection (in neither direction) between lib32-ffmpeg and lib32-libx264-stable-git.