This is simple youtube trick which will allow you to download any youtube videos without any software or programme and in many different video formats such as mpeg4, 3gp, hd and many more from within the youtube site.
1. First Go to Youtube Homepage.
2. Then select the video you want to download. I will demonstrate with video url given below.
3. After adding any of the above keyword the above link will become.
4. Now you will be redirected to a new page from where you can download youtube videos in any format of your choice. You may also download only the soundtrack of the video in mp3 format.