I can see this as being useful for asking customers to record bug repros. The fact that it's a chrome extension doesn't bother me nearly as much as installing third party screen capture software.

This seems to be using Chrome extension API, not javascript.

Chrome extension API is javascript. What did you think the listings in the article were written in?

you guys should checkout something a wrote a few years ago, (its little rough on the edges still (chrome and FF works the best): http://www.ginzaworld.com/page/ginza_walk_demo1?layout=ginza...

its a pure javascript "screen" sharing app.

Thanks for the tip about Quick time, didn't knew that feature existed, saved some money as I was about to purchase screen casting software.

currently lacks the ability to download or share the captured video. works well otherwise.

Yup, I mention that explicitly. Future work :)