Being one of the famous, if not the most, video streaming site in the web today. Youtube archives tons of video files. Sometimes videos shared are cool and awesome, and having a local copy is quite a good option especially when you really liked the shared video.
However, these videos can't be downloaded just instantly as the site does not feature it. But the good part is that some easy tools are available to help with this process. And the best part is that these tools are free.
Before you can start the service, these applications must first be downloaded and be installed in your PCs (the links are in the References below). These files are just small-size applications and has easy-to-follow installation instructions. Just don't forget, you can install both but just one is fine.