I have used my GFX 100S for stills for about one year, and everything is fine. Now I want to shoot videos as well. After watching tutorials on setting up the camera, I was ready to start shooting. Then the ridiculous issue raised: which button starts and stops the recording? I switched to video mode and pushed the trigger, but nothing happened. I also tried the other buttons, but nothing happened. Could someone tell me what to do? Do I need a special memory card?