That's nothing like the occasional rattling sound I get on mine. Yours sounds more like interference. Is your mobile phone anywhere near the camera or cables? Are you turning any other device on that might be affecting it?
Re linking your video as I couldn't follow your link :
i'm charging my phone from the original mini0806 charger. But i always charged phone the same way. It seems to me that it is not the phone's fault but will try to make the tests tomorrow. I have second independent charger. I will take the phone away from holder or try to rotate them to vertical position.
I have make a test with all configuration/location of my phone and charger and today everything is ok with sound. I don't know what is wrong and why i get often noisy sound.