You can write your topic however you want, but you need to answer these questions:
What do you want to achieve? Keep it simple and clear!
I want to make a jumpscare where the player cannot move their camera around, and the jumpscare is a model that is in their camera (kinda like fnaf) What i don’t want is a jumpscare in a box.
What is the issue? Include screenshots / videos if possible!
I don’t know much about the players camera and how to put a model in it.
What solutions have you tried so far? Did you look for solutions on the Developer Hub?
I have tried YT and Devforum, none of them worked
You cannot put models inside the camera to give it the 2D effect. The camera is only an object. What you might be looking for is ViewportFrames, You can put a GUI in StarterGUI, and add a viewport frame, Objects can be placed into them, And you can play animations on them too. Maybe look into them: ViewportFrame | Documentation - Roblox Creator Hub
You could try setting the Camera.CameraType to scriptable, which makes it not able to move, then position the jumpscare model infront of the camera and play an animation