So pretty much as end of video shows Importing from Photos app will still fail since it has a 4.29gb limitation. I am on 13.2 beta 3 for my ipad 11. I am directly connected to files app with my sony camera a6400 set to mass storage. In the future if apple fixed the photos import app limitation you would set camera usb settigns to mtp. for now mass storage ; would suggest getting a SD card to USB-C reader/transfer to take advantage of importing speeds to files app since the camera alone is really slow to import