You have a new iPhone with lots of storage, plus a massive iCloud account Your videos can be backed up without you having to do anything! iCloud got the beautiful footage only to find out that iCloud compressed your video down to HD.
To do anything on the iPhone, you must get out of its ecosystem. We found this out the hard way - I told you to shoot in 4k - "I did" - no, it says it's in HD - no way - well, after some research, it turns out when Apple sucks your data into iCloud - guess what - 4k videos are converted into HD and they don't tell you. You have been warned….