I haven't watched the whole recording, only the first five or six stages. It plays back without problems on my dos mame 0.37b14. I didn't watch all the way to the final rounds, so I can't tell you what path he chose, but the great score doesn't seem to depend on the path. It's more of a change of playing style.(posted 9005 days ago)If you sit and wait until the timer turns red and then quickly clear a lot of squares until the timer is full again and those white "bubbles" appears you get bonus points. What Donut does is mainly sit and wait for the timer to turn red and then burst out in frantic clearing of twenty or so squares to fill the timer. Then he waits again and so on. Finally you just make sure the timer is full when you finish the stage to get the more bonus points.
This method scores lots of points and isn't as easy to pull off as it looks, but it is rather boring to watch. (And I guess it takes a lot of patience and free time to play it this way.)
Anyway, my sincere congratulations to Donut for a great score.
/Abbe