If you use BitComet, you can get the plugin and be able to download FLVs. It works easily in Firefox. It might work in IE. For legal downloading of videos under creative commons licenses, such as the weekly hak5.com, I just right click on the page where the FLV resides, and it’s easy.
On the other hand, some people want to protect their IP, so they go through some lengths to make it more difficult to download the FLV. In this case, you are looking at a 'swf", not an html page. What you need to do is find the original html page for a video, then right click on the page and choose Download with Bitcomet.
That’s one way that you could do it. I was able to download the file you were looking at by putting that link into a text file that I typed called test.htm and adding some blank space
where I could right click to bring up BitComet. Another handy Firefox plugin is DownloadThemAll, which also permits downloading of audio, videos and pictures that can be see in a browser.