WeVideo has been my go-to online video editor for the last year. Recently, I gave Loopster a try and while it doesn't have as many options as WeVideo it makes up for it in ease of use.
To start creating a video on Loopster upload video clips, audio clips, and images to your Loopster account. If you don't have any sounds to use, Loopster has a small library that you can access. After your media is uploaded you drag and drop it to the Loopster track editor. There you can rearrange elements and adjust their play lengths. Watch the video below to learn more about Loopster.
Applications for Education
If you're looking for an easy-to-use video editor for your students that offers more than Animoto, but isn't as complicated as full-fledged video editors, Loopster could be what you're after.