Cannot transfer video from Iphone 8 to pc

This is very, very frustrating.

If I plug in my Iphone to the pc thru a USB cable and try to transfer through File Explorer I get a message that says "the device is unreachable".

I installed Itunes and when I connect the Iphone it says "Cannot read contents of phone" and wants me to "restore" my phone to factory settings, which I don't want to do.