Megavideo Film MegaVideo PLZ HELP ;)?

MegaVideo PLZ HELP ;)? - megavideo film

HELLO!
I'm trying to understand how I can download videos from YouTube without limitation of time to see (I'm here to watch movies and there are only www.watchnewfilms.com YouTube movies) ...
If you know how to please tell me .. ;)

I tried the buffer to 100% and work offline, but it does not work ...
I have also tried to change the IP address, but not to ...

PS If it helps you understand my situation, so ... I have an Internet connection on a PC, and it is a course for my portable wireless too.