Can't save videos to iPhone
I've taken a number of short videos that I want to save to my iPhone to upload to social media, but the files won't save to my device. I've tried file formats .MOV and .AVI. I can save the videos to my itunes library and even when I "convert to iPhone version" they still dont appear on my device under films, nor show up in my photos app.
I also previously deleted the apple default "TV" app that comes with the phone and am unable to reinstall it as it doesnt appear when I sear the app store (does the app exist anymore?). I dont know if this has anything to do with it, but surely not?
I'm stumped and frustrated as all online help either suggests to reinstall the TV app (which I apparently cant) or to just convert files to an acceptable format (which I've done with no results).
Please help!
iPhone 5s, iOS 12