Well then your devices are still phoning home with telemetry that is still tied to your ISP assigned IP address (guest network doesn't provide any privacy).
"We're not actually a domain name registration service, we're a customer to these. We sit in between the domain name registration service and you, acting as a privacy shield.
When you purchase a domain name through Njalla, we own it for you. However, the agreement between us grants you full usage rights to the domain. Whenever you want to, you can transfer the ownership to yourself or some other party."
I have a Jellyfin server running locally. All my TVs either have a Roku device connected or are a Roku embedded TV. I also run PiHole and all DNS queries in my local network go through it. That way all telemetry, "phoning home", and advertisments are blocked. All my TVs have the Jellyfin Roku app installed to stream my local content.
If you want access outside your local network. I setup Nginx Proxy Manager (NPM) locally and have my own domain pointing back to my NPM server to access my Jellyfin content and other self-hosted services that I run.
What you are likely referring to is a "nomad" residence. There are some states that allow this, such as Florida. There is a process to getting this status and you would want to do that before opening a new account in that state.
It didn't grant access to video. It just allowed public safety to say "Hey, everyone in this area, we had an incident and would like video if you have it and are willing to share it." The owner then had to manually share the video with the public safety agency in the app. The loss of this valuable tool actually harms public safety and make is more difficult and time consuming to solve crimes.
Agreed, they are continually improving it