How to download the original insv file from iphone to pc?

ONE X2: During a trip I have downloaded video and picture files to an iphone to get free space in the camera. Now, I want to edit the original files in the PC (MAC), but there is no obvious way to transfer the original capture. It allows just to export the files in a mp4 format. Is there a way to transfer the original insv file to the PC editor?

Thank you in advance.