Unfortunately, you can’t transfer media files from iOS to Mac using iTunes, however, we suggest you use the Mac software Image Capture instead.
Here is how you go about it:
Connect iPad to Mac with a USB cable or via Wi-Fi.
Open Image Capture.
Select your iPad on Image Capture.
Select the video you would like to transfer.
Select the Target Folder.
Transfer the video/videos.
Once the transfer is complete, a tick mark will display in at the right bottom of the thumbnail.