How would i go about making this?

Hello everyone. Im struggling to figure out how to recreate this camera system.

Heres a video of what i want to create :


looking at this i already see alot of smooth tweening on the camera + camera manipulations,
first step is, zoom the camera on the player like on the video above,
second - since i don’t know too much about camera tweens and etc…
just try and search some video explaining it

A good place to start would probably be the code behind that mod, if you can get it.