Download the freeware tool ORBIT DOWNLOADER.
Google it, download it, and install it.
This will allow you to download ANY VIDEO from ANY WEBSITE that you ever come across and are able to watch.
(I've found that Orbit Downloader works better and easier if you use Internet Explorer browser to both download the Orbit Downloader and also when you are searching for videos to download.)
If you are gonna use FIREFOX:
There will be a small tiny arrow at the top of the video in which you want to download.
The small tiny arrow is almost transparent so you have to look really careful for it at first until you get used to seeing it, and where it appears.
Watch this YOUTUBE Video on using it with FIREFOX to see and understand how the small arrow looks.
http://www.youtube.com/watch?v=c4v2MFWibWQ