I understand the importance of being able to playback your videos with superior sound. The concern you are experiencing is due to the Noise Cancellation software being enabled while the device is recording. Due to this, the sound that you hear is that from the microphone on the bottom of the device. You could try third party applications from the Android market. I do apologize for any inconvenience taht you may have experienced.
So can anyone suggest a 3rd party app to use???