Thanks for posting this, Howard. It makes a change seeing shots that were taken by choosing a time when light is at it's most beautiful. I loved the crane style shot close up behind the tree with the sun peaking through.
With regards to the quality, I examined some footage that was posted here a few days back that was raw and untouched straight from the X5. There are improvements in some areas, but I was still seeing mushiness issues with complex foliage. It is better than the X3, no doubt. But I'm not sure that it is £1500 better. And that's my quandary. Yes, it is a better camera and better in some areas, but I am torn as to whether that improvement is really congruent with the upgrade price. I am not sure that it is.
As one of my DP friends always says, picture quality, when all is said and done, is down to the light and the composition. If we imagine that your video was taken with an X3, but nobody knew what camera or multi-rotor was used, it would still be a very nice video!
Just an aside regarding comments of overly sharp X3 footage. Remember that the electronic detail levels on the X3 can be dialled right down to nothing. In fact I would recommend doing this because it will give the compression system a much better chance. You can add in finely controlled sharpening in post if required.
It looks like you may have used some post sharpening in this video, or put the in camera settings up a notch or two over some of the other test footage I have seen from the X5?