We are having issues with the Play Store due to some of their policy updates, and haven't yet found a compromise that works.
The short version is that we can't release on Android TV anymore without either giving Google our private signing key, or we have to drop support for TV under API 30 / Android 11, which is most of our TV users.
We are sorry for the inconvenience, we have been stuck with this for the past few months, and it is also frustrating for us.
F-Droid makes their own releases builds based on our release tags, but if we did a special release tag for them, that would mean bypassing the beta process that we go through with the Play Store, and subjecting F-Droid users that did not sign to be beta testers to all the issues that would come with it.
In the mean time if you want to get the latest features, we do publish vlc-android builds every night based on the current master with an auto-update that we added recently so you can have regular updates if you wish without having to download another apk. You can find them at https://artifacts.videolan.org/vlc-android/nightly-arm64/.
In general, get.videolan.org is the official release source for any videolan project.
https://artifacts.videolan.org/vlc-android/release/ is where Gitlab puts the release once it's been built by the CI. This is not yet signed as a release, and you should not use this. It's mostly for our internal release process, the apk is signed manually on our side before being reuploaded to the store and get.videolan.org.
https://artifacts.videolan.org/vlc-android/nightly-arm64/ is where Gitlab puts nightly builds. These are not release builds but nightly debug builds, and if you install an apk from there, it will not replace your vlc installation, but install a second "debug" vlc with a different background color for the icon like this:
These builds are built every night on master, and are mostly used when exchanging about issue with users, to see if an issue was fixed, or some users want to have an up to date build.
Sorry, the response above wasn't clear about the type of build nightlies were.