My crouch script located in StarterCharacterScripts doesn't work at all?

local player = game.Players.LocalPlayer

local mouse = player:GetMouse()

local char = player.CharacterAdded:Wait()

local hum = char.Humanoid

local animation = Instance.new("Animation", player.Character)
animation.AnimationId = "rbxassetid://05107306531"

animation.Priority = Enum.AnimationPriority.Movement

mouse.KeyDown:Connect(function(key)
  if key:lower() == "c" then
	hum:LoadAnimation(animation)
	animation:Play()
  end
end)

mouse.KeyUp:Connect(function(key)
  if key:lower() == "c" then
	hum:LoadAnimation(animation)
	animation:Play()
  end
end)

I put this local script I made in StarterCharacterScripts. Some stuff here I learnt with tutorials. If you spot anything please tell me!

local Player = game.Players.LocalPlayer
local UIS = game:GetService("UserInputService")
local Animate
local Humanoid = Player.Character:FindFirstChild("Humanoid")

UIS.InputBegan:Connect(function(input,gameProcessed)
		if input.KeyCode == Enum.KeyCode.LeftControl then
			print("Player Pressed LeftControl")
			local Animation = Instance.new("Animation",Player.Character)
			Animation.AnimationId = "rbxassetid://5002919222"
			Animate = Humanoid:LoadAnimation(Animation)
			Animate:Play()
	end
end)

UIS.InputEnded:Connect(function(input,gameProcessed)
	if input.KeyCode == Enum.KeyCode.LeftControl then
		print("Player DePressed LeftControl")
		Animate:Stop()
	end
end)

Here is a video of the script in action.