Unifi Video was replaced by Unifi Protect some time in 2020. I wasn't sure how to self-host Protect, so I never migrated to it. I've recently reached a situation where some phones can no longer install the Unifi Video app. These phones are now relegated to using the rough-on-mobile UI. The Unifi Video web UI has also never worked well in Firefox for me.
Replaced my Synology surveillance station since 2023, and has been running great. I also have a Google Coral for the image processing, but this is optional.
In the past few months, I've finally started working on a basic replacement NVR that works for me: https://github.com/AlbinoDrought/creamy-nvr
Like many video projects, it's a glorified ffmpeg wrapper :)