Vyclone is a social video platform that lets you co-create, sync and edit multiple views of a shared moment, effortlessly. It is a free service for collaboratively editing videos on your iPhone, on your Android phone, or on the web (does not work in Firefox, only with IE 10 or Chrome). It can be an incredible ELT resource if you assign your students with a group project, for example. Give it a try!
How it works: