How to download this video?
In the right of that page, There is a link , “Watch This Demo”
I want to to download it. How can I do that?
It is a Flash video. I use Real Player to download these. There is an option to download a video when you right-click. You can also set it up so a download option pops up for a few seconds when you hover over the video.
I know Real Player isn’t the most popular software, but I quite like it.
There are extensions in FF to download videos
Which extension?
Did you try it yourself?
Constantly 
Downloader helper is one of them and Unplug is another one. Both are extensions for FF.
No, I mean try on that site my friend
right click here and choose save target as 
Done with UnPlug. What would you want to download Intel’s videos. I only do it because my computer often enough gets stuck if I watch them online.
You can also use the DAP (Download Accelerator Plus). now it is integrated with the toolbar which have the download video option. when you plays the video then that button starts blinking and than click on it. It will start download with another benefit of downloading with the acceleration. just try this one.