Standard video recording is at 30 frames per second. 24 is standard for cinema. Exposure at 1/30th of a second is the minimum you can do at a 30fps frame rate. Any less would not give you any better exposure since the shutter is open for the entire frame exposure. Since you cannot adjust iris (f-stop) the only way to increase exposure is to increase the ISO. Increasing ISO introduces noise to the video so if you are willing to live with that you should be able to get the camera to work well in low light. The higher frame rates have a similar limitation. 60fps, lowest would be 1/60 sec, 120fps, 120th sec and so on. The higher frame rates are good for doing slow motion video as the video stays very smooth when you slow it down in editing. The compromise here is that your low light capability is diminished at high frame rates.
Standard settings for video are to set shutter speed at double the frame rate you have set. That gives the right amount of motion blur in playback, similar to what your eye perceives. Increasing shutter speed starts to introduce some judder in the video but can give some interesting effects like when filming falling water - you can start to see the individual drops and spray on playback.
Sorry for the short course in video. CGO3 camera has manual settings but nothing is explained about them so I thought this might be helpful for you.