Someone with HDR check it out!
The dumb mode is the one giving the closest yellow color comparing to HDR, by far !
You can see it even better in the next scene of the video.
EDIT : The first scene of this video is also very interesting to test the different modes: http://4kmedia.org/samsung-travel-with-my-pet-hdr-uhd-4k-demo/
The blue color of the sky is completely different. The scientific mode alone seems completely wrong comparing to HDR.