In terms of the camera zoom does not work issue, We have added more detailed product Description for the camera zoom.Digital zoom: 16x(auto focus is not supported, Optical zoom is not supported.)The camcorder zoom belong to the ?digital zoom?, don't belong to the ?optical zoom?.The camera is designed without ?auto focus? feature and the camera didn't belong to the ?auto focus?.the camera has the ?digital zoom? function that can be zoomed in or out using the camera w/T button. In terms of the camera screen went green issue, We have added more detailed product Description for the camera screen.Memory card: Support SD memory card and MMC card, 4GB up to 32GB.(The SD card is not included in the package, need to purchase separately)please format The memory card through this camera for the first time use (SD card is not included in the package).how to format The memory card: Please press the "menu" Button, then press the "right" Button to go to the right menu. (Press the ?down? button) Go down all the way on the menu, there is a ?format? option, press the ?OK? button to choose "Yes". In terms of the only imports audio without video to computer when trying to upload issue, We have added more detailed product Description for the camera connect to the computer.Please turn on the camera, insert the av?usb cable into the camera and computer port separately.The computer will automatic install driver and the computer screen will display the driver installation is complete.Please press the camera "mode" Button to choose the camera ?msdc ?mode, then open the U disk, the camera files can be seen. In terms of the camera record button not always working issue, We have added more detailed product Description for the camera record button.Record video mode: please press the "mode" Button Go into the ?record video mode?, then press the ?red dot record button? to start to record videos.