The incredible video was posted by YouTube user akiyuky who writes about the complex device:
Lego Great Ball Contraption (GBC) in my house.
my own 17 modules
tracking the blue and red balls.
running at 1.0 balls/sec
size : 1.5m X 6.5m
path length : 31m
So, yup, still mind-blowing, creative and crazy in all possible respects. Just a little more so now. A big triple-rainbow salute of excellence goes out to akiyuky from us here at The Feed for this contraption that continues to captivate! And if you'd like to learn more about it or the creator, you can go to his blog by clicking here (it's in Japanese, so I've applied Google translate to English).
construction time : 600 hours