Camera is not going back to players control original view after tweening?

--All scripts made by BM
local TweenService = game:GetService("TweenService")
local player = game:GetService("Players").LocalPlayer
flag = true
local cam = game.Workspace.Camera 
local cutsceneTime = 8
local tweenInfo = TweenInfo.new(
	cutsceneTime,
	Enum.EasingStyle.Quad,
	Enum.EasingDirection.Out,
	0,
	false, 
	0
)

function tween(part1, part2)
	while flag do
		wait(.1)
		cam.CameraType = Enum.CameraType.Scriptable
		cam.CFrame = part1.CFrame  
		local tween = TweenService:Create(cam, tweenInfo, {CFrame = part2.CFrame})
		tween:Pause()
		script.Parent.MouseButton1Click:Connect(function()
			tween:Play()
			flag = false	
		end)
	end
end

wait(.1)
--Wait til player presses play
tween(workspace.cam1, workspace.cam2)
if flag == false then
	camToPlayer()
end

function camToPlayer()
	wait(cutsceneTime)
	cam.CameraType = Enum.CameraType.Scriptable
	player.CameraMode = Enum.CameraMode.Classic --This part doesn't work idk why
end

-I tried different variations such as cam.CameraType = Enum.CameraType.Custom in the function camToPlayer and it just won't reset to player cam control after camera tweening it just stays stationary in my workspace.cam2. Help?

The easiest way to reset the camera is:

camera.CameraType = Enum.CameraType.Custom
camera.CameraSubject = humanoid -- path to the player's character's humanoid

Try changing your script:

-- lines ~23
tween:Play()
tween.Completed:Wait()
flag = false