I have just completed a lesson on TedEd. You can view it here: http://ed.ted.com/on/SBraBT3U. Please feel free to look at it and comment/provide feedback. Also, I found out that hard way that once you "publish" your lesson, there is no way to go back and edit it- if you have a typo it is there for everyone to see. Luckily, I just redid my video b/c it wasn't that long, but if your lesson is longer it will be more annoying to redo due to a typo.