Blurred Area in Chinese Chang'e-2 Lunar Probe Video

The following pictures are stills from the Chinese change-2 lunar probe video on this official Chinese site.
I have not altered or re-sized the stills in any way, just cut the unimportant parts to the right and the bottom.

This is the 1st still from the video captured at 36 seconds.
You see a blurred area close to the top on the left side.


Now the 2nd still from the video captured at 37 seconds.
The blurred area has now moved further to the right and further down. Also note that it shows now various colours that do not appear on the first still.


Finally the 3rd still from the video captured at 38 seconds.
The blurred area has again moved further to the right and further down. The colours have now all but disappeared.



Here again the area in question side by side, this time I have increased in each cut-out the colour saturation to "80" using the graphics editor "Gimp" to highlight the colour differences:
  
So what do you think? What is hiding behind such a blurred area? And why was the blurring done in such an obvious way? Did somebody want the general public to know that there is a cover-up? If so - thanks, you have succeeded!