Habe gerade in einem englischsprachigem Forum die Lösung gefunden und ausprobiert und funktionierte tatsächlich:
I think you may just have to change your usb option on the phone so it is connected as a media device rather than a camera, then you will see the video files as well as photos in the folder. I just had the same issue and that seemed to solve it. Use the top pull down menu and click where it says 'ongoing..connected as ...touch for other usb options'.