Hacking Youtube to find good quality videos

You don’t know how to download high quality videos in youtube? then this tutorial will help you to download it. 

Step1: Click to video that you want to see, the link will display on Address bar.
Example:  http://www.youtube.com/watch?v=Ne1l6VNkuLM
Step2: Add &fmt=6 to the end of that string.
That address like:

Optional Step: To get more quality youtube video
.Add   &fmt=18 to the end of that string, you’ll have the best quality video with direct download link !

Note: Appending &fmt=6 to the URL delivers a 448×336 resolution version of the video and appending &fmt=18 delivers a even better 480×360 resolution version.