A common problem is that the 4k60 files from phantom 4 pro, dont import into ios. This makes import into ipad very difficult and relys on wireless storage like filehubs.
Installed ipadOs beta 2 last night and tested the import.

4k60 files will now import directly into the photos gallery from SD card, or if on a hard drive, will import into any folder you choose.

Just putting this out as i know it was a big problem for many

If you are using the Apple products, you need to change the settings to record video clips with the .MOV suffix.