PopcornMaker is a cool Internet-enabled, online movie tool with timeline-based editing.
Pop in media from YouTube, Vimeo, SoundCloud, or an HTML5 video source. Or start from scratch. Then add text, images, popups, Twitter feeds, Wikipedia articles, or GoogleMaps. Then either link to the Popcorn file or embed it exactly the same way you would a YouTube or Vimeo video.
If that sounds confusing, check out the interactive tutorial and all will be clear.