> On some website, such as news site, they have link to 
view 
> their video file, so that once I click it, it 
> starts 'widows media player' or others.    But it freezes 
> numerous times depending on connection.    How'm I 
> supposed to download those file, so that I can view it 
> offline?
Unfortunately, most of time, no. These files are generally 
sent using streamed protocols, in realtime, and this is 
quite hard to handle (this is not implemented at all, in 
fact, in httrack)