Unfortunately, the image size is somewhat big for the design of my web site, unless your browser is already maximized. Anyway, ‘jing’ is a tool to record and upload screen-shots and screen-casts in pretty much one shot. Then they can be linked and embedded from screencast.com just like YouTube.
Unfortunately, it seems hard or impossible to edit videos effectively after recording. Same as other one-shot recording tools like iShowU and Snapz Pro. If you want to edit, transition, or separately mix audio and video, then it seems iMovie needs to get involved. Still need to read up on that. But Jing seems to be the most convenient of the one-shot tools.