This video creation tool is free, simple, and fully online.  It includes built-in templates or gives the option to start from scratch.  It is probably the easiest tool for importing media of all types, since it allows you to directly import a video from a URL, rather than having to download it then upload it into the program.  It imposes no limit on video clip length, and its audio, video, and photo manipulation tools are extremely limited. It does have a rather large library of free music for you to use, and you can have up to 2 audio tracks, but you cannot record narration within the program.  You can include text, but you can’t overlay it on top of a video (i.e., there is only one video track).  Stupeflix is great for quick projects or student projects, but offers limited functionality.  It is also a bit unstable (as features seem to change from day to day) and its preview features are a bit slow and glitchy.

Stupeflix is easy and intuitive.  If you would like help getting started, check out these video tutorials from Joshua Howard, or search for your own tutorials online.