MacBook Air rev A Fan noise

Hi Im new to this forum but Is there anyone out there have the same problem as me. I have this mac book air for over 4 mos and suddenly yesterday I hear this buzzing sound on its Fan it sounds like the fan is about to die. I have a youtube video
http://www.youtube.com/watch?v=9tNW6Bw9cnE

Anyone???? Experience the same. Im bringing it to apple store and see what they say about it

It says the video is private. I can not view it.

Here you go

I actually upload it using my N95 it automatically put it in private mode sorry about that