It was captured using the huffyUV codec, which is a lossless system.
That means there is not one single pixel changed from the captured image (unlike jpeg, MPEG, WMV. MP3 lossy codecs etc.)
So we are working in what most people would think of as 'uncompressed' video.
Huffy does compress the file sizes a bit, but does it just like a ZIP program does for zipfiles, it just stores them more efficiently without changing one atom of the original data.
Of course when they are posted here, we save them out as jpeg files which degrades the quality a little for your viewing pleasure, but not enough to worry about.