Photo editing is a lot easier to do than video editing, yet it is not on iPhone. Audio editing is a lot easier to do than video editing and it is not on iPhone now. all those editing things are way way easier to do on the computer and iPhone just need very basic image and audio manipulation. Video editing is very very resource intensive, so it is extremely unlikely that it will be available by default for all new iPhones. at very best it will be cropping, somewhat similar to cropping of photos of current pictures (when you pick and image for contact). most people never ever edit any of their photos or videos on the computer, so there will be even fewer people who would ever do that on iPhone. just be real