How can I rotate the camera?

This is my attempt;

camera.CFrame.Angles = camera.CFrame * CFrame.Angles(0,0,-5)

I recommend you to use math.rad()

camera.CFrame.Angles = camera.CFrame * CFrame.Angles(0,0,math.rad(-5))

And to change the cameraType to Scriptable

The camera manipulation page has a portion about rotating the camera (Camera Manipulation)

I get an error angles cannot be asigned to

camera.CFrame*= CFrame.Angles(0,0,math.rad(-5))

camera.CFrame *= CFrame.Angles(0, 0, -math.pi / 36)

Can you explain this to me? and why would you use math.pi?

math.rad(-5) is the same as -math.pi / 36, you can choose if you want to call math.rad or divide math.pi.

So camera.CFrame*= CFrame.Angles(0,0,math.rad(-5)) would be the same as
camera.CFrame *= CFrame.Angles(0, 0, -math.pi / 36)?