Download videos from YouTube Without any software

For downloading videos from YouTube there are many tool available like IDM, YoutubeDownloader etc but if you want to simply download videos without any software you can use this trick 

1. Open the youtube link you want to download.Like - http://www.youtube.com/watch?v=W7kdKf_aqX4
2. Now just put win before the tube in link like - http://www.youwintube.com/watch?v=W7kdKf_aqX4
3. Press enter,you will soon be redirected to download page. 
4. From there just click on the format of video and your download will start

Thank You.