Easily save videos from youtube to your hard disk.

If you want to easily save videos from youtube to your hard disk, then when look at the video copy and paste in the address bar the following javascript code: 

javascript: window.location.href = 'http://youtube.com/get_video?video_id =' + swfArgs [ 'video_id'] + "& l =" + swfArgs [ 'l'] + "& sk =" + swfArgs [ ' sk '] +' & t = '+ swfArgs [' t ']; 
Once saved the file rename to 'onoma.flv'. To play the video try vlc media player. 
Note: This method works in Firefox, Safari, Google Chrome and Opera browsers.