I have a big meeting room with four cameras , Can i Use 4 camera at same time in teams ? the 4 camera i need to use it for my account , i mean if i use the teams with my friend (X) thats mean (X) Can See me With Four Camera
If you want to show all your cameras at the same time in Teams you need some other software to merge them to one camera stream firsts (there are multiple of tools for that) or if you want to switch between different camera angles you would also need third-party tool (or switch device in Teams).
A free tool you could test is the OBS studio software, it is open source. You can select multiple cameras and output to a virtual camera that you can select in Teams.