Nice trick dude.. It's working
I've another trick... I'll like share
This trick works only for firefox, though
What you need to do is, install a plug-in by name "downloadhelper" (without quotes)
You can download & install it from
here
Then whenever you see any video in firefox the application allows you to download that video,without changing anything in URL

also, above plug-in allows you to download any video from any video viewing site also like metacafe.com, etc....
I'm using it from last 6 months
hope you like this trick as well ...