What you need is achievable but needs some technical knowledge. These are not IP Cameras directly accessible from a local endpoint. Everything is tunneled through your sync module and Blink servers for lately being forwarded to your mobile app. Take a look at my project on GitHub, there is a thread in this forum called Open Source Desktop Viewer, it is Windows based though. It also creates a local endpoint but with extra steps.
You could do the following: Install this application in a Windows computer that is accessible from the other computers. They will be able to connect to the web that this application creates, view stored videos and even live view cameras. The problem is you can only live view one at a time so once a user is checking a camera the other ones will not be able to live view.
This application connects to the camera and retransmits the stream to m3u8 format (Apple TV) that is accessible via HTTP, HTML5 then just renders this stream. This means you have a live stream in your local network accessible for everyone even using VLC Player that works with m3u8 files.
So, for your case this application needs to reuse an existing live view stream for everyone or create a new one. Can be done but you will need to create an issue in its GitHub project so I try to implement it.
If having a Windows system is not an option, there is a Python project in GitHub but I think they do not have live view implemented yet. I know this is not a great solution but an IP Camera sounds more suitable for you.