The Waltz of Death or Something Else

The midi composition below is absolutely fantastic. It seems to be of Japanese origin although this video was uploaded by a Korean person who titled it 죽음의 왈츠 ("Waltz of Death"); the commenters, howerver, are of different opinions as to the actual title. Whatever the title, it is a mind boggling piece of music. It is impossible to play -- one person just do not have enough fingers or dexterity to pull it off. It probably needs to be played by a number of people, anything from four to eight, I would think. Still, if it is possible to actually play this thing, I'd really want to experience it.