PC Soft: Youtube Tricks

I like to share these trick with you may be many of you already know about it. 
1) Stereo versions of youtube videos 
If you add &fmt=18 to the end of a URL on You Tube video you get 
the stereo version of it if there is a stereo version available 
2) Watching youtube video in High Definition
If you add &fmt=22 to the end of a URL on You Tube video you 
get the stereo version of it if there is a Hi Def version available. 
3) Converting youtube video to MP3 files
Just Go on
 http://www.listentoyoutube.com