View the source and search it for ".flv", which should show you the location of the flv file that the video player loads, then just load the file directly and save it to your computer.
I searched the source code for .flv and no results were found. However I found a link in the source code which led to this, which is the video I want without the website around it. I viewed the source code of that page, and there was no .flv files there either. So how could I get this onto my computer?