I have recently been taking more videos than photos with my iPhone 4 but noticed the sound is barely audible. Am I doing something wrong or is there a setting I need to set? I have no issues with talking on speaker sphone, play music, or watching shows through the speaker but when it comes to quality from recording a video I can barely hear it when playing it back. Is this a known issue or has it happened to anyone else? Is it possible that there is something wrong with my iPhone 4? I did a search on the forum but didn't come up with anything. Any idea?