Quick reply...
But it can also be noted that similar blue circles, to signify where invisible finger touched the screen, are present in N900 video. As if they made screenshots on N900, skewed them appropriately and inserted into the video - with this debugging-accessibility tool turned on.
Oh, and how easy-difficult is it to make a screen-video - continuous string of screenshots? As in, on N900 screenshot-image is taken with Ctrl+Shift+P.
Best wishes. Thank you.