How to make a camera controller in Unity?

Question

Unity

I have an idea for a game, for it I need to make a camera like, for example, in the game "theotown". That is, the camera is on top and it is controlled through swipes. Everything would be fine, but, damn it, I lost 2 hours searching for information - how to do it. But it's all in vain. Guides are mostly of the following content: "how to make an fps / tps controller", or: "how to make a camera for a runner". Of course 2 single guides: ( https://youtu.be/oOKaaH-Br5o ) and ( https://youtu.be/eneF-fvrMRM ).
But it does not work for me, as if the unit does not detect swipes. Please upload a video or a script that will work in unity 3d.