There are various youtube tools on the Web that enables Youtube users to download YouTube videos and hack Youtube.
Here is one of the fastest and simple way that you can download videos directly without copy and paste any youtube URL into the form of the youtube downloader website.

Fastest and simple way to download from YouTube.com:
1. View a video on YouTube.
2. In the URL location box, type pwn in front of youtube, and enter.
3. Get links to download the video!

What you need to do is just type to add in the keyword “pwn” in front of “youtube” in the URL location box and then press enter.

After that you will be directed to the “pwnyoutube” download webpage that you can download the YouTube videos in:
Standard quality video (.FLV) format.
High quality video in (.MP4) video format.

This easy and simple tool really save us some time to download any youtube videos.
No software.
No copy/paste.
Any computer.
Fair rights use.

Try PWNYouTube.