Here is a short video covering ~116 hours of night and day from the new Palomar Observatory all-sky camera:
Here is a direct link to the video on YouTube.
Notice at night in the upper and lower right it never gets completely dark. This is light pollution, aka sky glow, from city lights.
As you can see in the daytime, the sun completely saturates the camera's CCD detector causing it to heavily bleed out on to other parts of the image. In spite of this, the camera is still a good daytime cloud detector (when we have clouds).
The camera is not yet up for the public, but that will be coming soon.