This week +Kelly Rush announced several revisions to TechSmith's SnagIt for Chrome app and extension. The big highlight was the scrolling feature which allows one to capture the entire page even if it goes past the viewable screen.
Since there have been several revisions lately, now is a good time to take you through them one by one. For this screencast I use Screencastify which on Chrome OS beta (37) allows me to capture audio on my Samsung Chromebook.
In this screencast, I demonstrate capturing by region, visable, scrolling, and creating an animated gif. All aspects of the screen capturing and editing process was done on a Chromebook - Samsung with an Atom processor to be exact.