Even if the camera was designed to withstand up to 1000 sieverts, the radiation inside (not measured) was usually dramatically high if we are to judge by the intense radiation damage (like static) in most images. The water level was not at all where TEPCO expected it to be but the temperature gauges seem to be more or less correct.
The three videos, which are an important document of our time, can be watched through this entry of Fukushima Diary. Most information on this operation and its results is concentrated in a previous post in the same blog.
One of the videos: