How to shoot a video?

Lon-press the REC button for 2 seconds to enter the video Live view interface, then press the REC button to start shooting , press again to stop. Long-press the REC button for 2 secends to dropout the Video Live view. During the video Live view and the video shooting, you can press the shutter button to quit to still image live view. 
One click shooting video function : press the REC button to start shooting, press the REC button to stop and quit to still image Live View.