Download File Youtube Tanpa Software

1) Open your video and let it start playing

2) Copy the URL of your video
   For e.g. How to hack mobile phones with Bluetooth

    http://youtube.com/watch?v=5WRLtBl-lqo

3) Replace the "/watch?v=" with "/v/"
   Before: http://youtube.com/watch?v=5WRLtBl-lqo
   After: http://youtube.com/v/5WRLtBl-lqo
AND NOW PRESS ENTER

4) Now you will get a full screen video and a new URL in your address bar
  My new link:
http://youtube.com/swf/l.swf?video_id=5WRLtBl-lqo&rel=1&eurl=&iurl=http%3A//i.ytimg.com/vi/5WRLtBl-lqo/default.jpg&t=OEgsToPDskIj_h-ZpAN5lE6E5-YSevAf

5) Now replace the "/swf/l.swf" part of your video (note: you may get anything other than l.swf in your URL, so in this case just replace the '/swf/(some letter).swf') part with "get_video"

Before:
http://youtube.com/swf/l.swf?video_id=5WRLtBl-lqo&rel=1&eurl=&iurl=http%3A//i.ytimg.com/vi/5WRLtBl-lqo/default.jpg&t=OEgsToPDskIj_h-ZpAN5lE6E5-YSevAf

After:
http://youtube.com/get_video?video_id=5WRLtBl-lqo&rel=1&eurl=&iurl=http%3A//i.ytimg.com/vi/5WRLtBl-lqo/default.jpg&t=OEgsToPDskIj_h-ZpAN5lE6E5-YSevAf

MAKE SURE THE "?"  IS STILL THERE IN THE LINK!!!

AND NOW PRESS ENTER

6) You will be prompted to download your video, so do it!

7) After downloading , U can Play it by vlc Player without any Prob.

[Source : Hitman]