Debian nightly builds are not uploaded to artifacts.videolan.org
https://artifacts.videolan.org/vlc/debian/
The latest is from June 20th.
This is at the end of the Gitlab jobs for Debian:
Uploading artifacts...
WARNING: contrib/vlc-contrib-x86_64-linux-gnu-*.tar.bz2: no matching files. Ensure that the artifact path is relative to the working directory (/builds/videolan/vlc)
WARNING: contrib/SHA512SUM: no matching files. Ensure that the artifact path is relative to the working directory (/builds/videolan/vlc)
ERROR: No files to upload