YouTube has been designed to only allow users to watch and view videos on their website. Many users want to download or save their favorite YouTube videos to their computer so they can watch them without being connected to the Internet or on other devices. Below is a link for the steps required for downloading and watching YouTube videos on your computer for free.
http://www.computerhope.com/issues/ch001002.htm
However, if you still need help, please submit a helpdesk ticket.