How ISO affects Moving Image

This is a short experiment regarding different levels of ISO. The ISO setting is the setting that establishes how sensitive the cameras sensor is to the available light source. In the video above I used a relatively low ISO setting considering how little light I was able to work with at the time. The ISO seeing i used was ISO 800. You can see that the image is crisp and more detailed than it would have been if I used a higher ISO setting. However the image is also much darker and underexposed and therefore less clear.

In the video below