Hi Guys, another noob here.

Could someone please share video settings to allow simple export to and viewing on an iphone/ ipad? Ive currently got videos shot in .mov/ 4k resolution and stuggling
to even transfer them let alone play them? Any help would be appriciated thanks.   

Hello dj.trillium, unfortunately DJI Go app has a limitation of this. You can only download the 1080P or lower resolution videos files to your IOS devices. But you can use your computer to view the 4K files.

It has nothing to do with DJI Go. The iPhone and iPad's hardware is not powerful enough to watch 4K. You should play them on a computer.