Ankur Thakur, iDownloadBlog:

Wondering how you can send a big video, graphics-heavy document, or other large files to someone from your iPhone? Look at ten ways to send big files from your iPhone to someone on another iPhone, iPad, Mac, Windows PC, or Android phone. Most methods here are wireless, while others will require a Lightning cable.

This is worth bookmarking, for that moment when you find yourself having to move a massive file from one device to another. Nice walkthrough of each technique, with detail and links to more detail.