I want to Murrow my iPhone with my PC: how can I do that

Assuming you have a smart TV that supports AirPlay, or you have Apple TV, when viewing something you want to see on the TV open the Control Center and tap the Screen Mirroring button and select the TV. If you are watching Youtube using the Youtube app on your phone there should also be a mirroring button in it along the top of the screen. This works slightly differently from the Control Center’s screen mirroring, as it only shows the Youtube content rather that the entire iPhone screen.

How do you want to use it with your PC?