Widescreen on YouTube. Created using OpenOffice and Screenflow on my MacBook laptop with external 24-inch monitor.

YouTube won't show the full 1920 x 1080, though. If you have a large monitor (1920 x 1080 or larger) you can see the source file on the Internet Archive at http://bit.ly/6DtbIX

And download the zipped version of this QuickTime via this link. http://bit.ly/7sZ2Qu

The zipped file is relatively small - 7 MB. The duration of the video is about a minute.