How to download you tube video as MP4 file:

How to download you tube video as MP4 file:
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http://www.youtube.com/get_video?video_id=ID&t=SIGNATURE&fmt=18
Download Youtube video:
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copy the Youtube link
and go to the following URL and give the youtube link in the following site:
"http://vixy.net/rawvideo/"
we will get something like "Right click here to save as mp4 file";
and right click it and open it in a new window;

we will get the URL like above
http://youtube.com/get_video.php?video_id=zskO9O3hF78&t=OEgsToPDskI7pZ1ChBCot9co5DvFysF9&fmt=18
then it will show the file download dialog; and click on save button so that we can save it in local disk;

http://youtube.com/get_video.php?video_id=xoKbDNY0Zwg&t=OEgsToPDskJI-k1mwTeJHOC9_dadX340&fmt=18