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!
Fix camera issue. -
What is the issue? Include screenshots / videos if possible!
Aiming camera bugs out when the character is moving.
Please tell me what I did wrong, I tried to fix it many times 
AimClient
UserInputService.InputBegan:Connect(function(Input)
local plr = game.Players.LocalPlayer
if Tool.Parent:FindFirstChild("Humanoid") then
if Input.UserInputType == Enum.UserInputType.MouseButton2 then
Tool.Handle.Aim:Play()
script.AimLocal.Disabled = false
UserInputService.MouseDeltaSensitivity = GunSettings["AimSensitivity"]
Player.CameraMaxZoomDistance = AimZoom
Player.CameraMinZoomDistance = AimZoom
TweenService:Create(plr.Character.Humanoid, TweenInfo.new(0.1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0), {CameraOffset = Vector3.new(1.4,0,0)}):Play()
TweenService:Create(workspace.CurrentCamera, TweenInfo.new(0.1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0), {FieldOfView = 50}):Play()
end
end
end)
AimLocal {Enabled when player is holding MouseButton2}
RunService.RenderStepped:Connect(function()
if plr.Character then
local rootPart = plr.Character:WaitForChild("HumanoidRootPart")
if rootPart then
rootPart.CFrame = CFrame.new(rootPart.CFrame.p, rootPart.CFrame.p + Vector3.new(cam.CFrame.LookVector.X,0,cam.CFrame.LookVector.Z))
end
end
UserInputService.MouseBehavior = Enum.MouseBehavior.LockCenter
end)