http://mediaelementjs.com
https://github.com/casatt/html5-videoEditor
http://popcornjs.org
http://www.klaus-rummler.de/2012/06/25/review-of-the-some-current-online-video-editors/
http://www.wevideo.com
http://www.moviemasher.com/demo/example/javascript/
http://www.shotclip.com

http://easyhtml5video.com