So when I place a "camera" with the bezcam script by pressing G, it really slows down the game. When I place the second one, the game crashes. I've tried to close all the windows I'm running and applications, but it always seems to happen.
Can anybody help me? This is royally pissing me off so if anyone can help me, then do it please.

Try to download toribash 3.6 or 3.8 for BezCam. I personally use 3.9 when i using BezCam script, but this never happend. and in 3.91 its not work anymore.

Yes, but I want to use it with the actual version because of it's high FPS that isn't in the other versions.