I did not know about those options, thank you. It looks like OneDrive was converting .HEIC photos to JPG to my Windows 10 machine (When will Microsoft start supporting that extension?).
I edited the videos in iMovie iOS, used the Save Video option and then had OneDrive Upload the file- it's still in 30FPS. I then tried directly saving to OneDrive and the only option is 1080p.
Your suggestion did solve another problem though, OneDrive does copy the un-edited/non-iMovie edits as in the original video files intact, 4k with 60FPS, however, Premiere Pro would not recognize the video. Using your settings, this corrected that. So I can at least compile the videos, it would just be nice to be able to do "Quick" edits in iMovie and then export. :|
Edit: I copied the iMovie iOS edit to a OS X (High Sierra) computer via AirDrop and exported the video from OSX and it exported at 30fps. At this point I think that it's a bug on Apple's end. At least for now I can make my edits in Premiere Pro. Now we just need Microsoft to support HEIC format for JPGs.