OpenGL Advise is needed

hi guys .. i wana to start in learning OpenGl , any advise that u can give , like eBooks, tutorials, must have previous knowledge, any thing will be much helpful.
I don't know much about OpenGL (only did a few 3D samples), but this site helped a tonne http://nehe.gamedev.net/
@Bourgond Aries, i know that site, but i want video tutorials if possible,
thanks anyway
youtube video tutorial is very easy and good http://www.youtube.com/watch?v=FhQBsV-zdqI
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