Macbook is making very weird, whining and high pitched noise in photobooth.

[clarabuuuu]

I purchased my macbook in March 2009, last year, and from the start, I've noticed a kind of whining noise while playing back videos in photobooth..but overtime, it has gotten worse.. everytime i record a video, and then play it back, first there is a clicking noise, and then throughout the whole video, there is a sort of high pitched whining noise, that is pretty loud. Before, i had 1500 photos and videos in photobooth, and i deleted them all today and when photobooth was empty, i made a video and the same thing happened. Also, sometimes when i record videos, there is no sound, and a lot of time when i record, the videos turn up being much shorter, in length, then they were originally. I also thought the noise could be from the fan in my computer, but then i made a video when there was no noise at all coming from the fan, and my computer was silent, but it still made the loud whining noise when i played it back! I'm thinking of bringing it to the apple store and making an appointment with them, so hopefully they can do something, because it still hasn't been a year since I bought it. Can anybody help? Thanks!