You Tube : impressed by very good lectures and interviews of great personalities

I have been out of You Tube, as I was having the impression that its waste of time. Few months ago, while I was with some friends, who are doing business, said they are Cohesive with You tube, although, I find he is very top person in his business and consultancy after coming out from Top Asian Management School.
Wow, recently I just browsed for golf lessions to learn, once I found, slowly searched for some management articles, to my dismay, I have got some very good, priceless lectures of Guy Kwasaky's lecture at Standford University talking about his book " The Art of Start". In fact, I was so impressed with You Tube. 70% of the book is finished reading. (http://www.youtube.com/watch?v=FU6ssv9ST6E&feature=related).
How to do a presentation: 10-20-30 basis: http://www.youtube.com/watch?v=liQLdRk0Ziw&feature=related.
You can find lot useful to our life, You Tube is really beneficial one.
Good, when I browse, found lot of good guest lectures of Nandan ( Infosys) many. Enjoying is and sharing with my network too.