buzzing sound while video recording

[AC Question]

Hi, I have samsung note 3. There is no problem while voice recording, but when I video record, there is a buzzing sound in the background, not that loud, but when you increase the volume, it becomes somewhat disturbing.
What is this problem? And how much does it cost to repair it?

 

[nahoku]

Might be the camera adjusting the image stabilization. You might try turning it off if it's on and see if the noise goes away.