We've seen quite a few unorthodox controllers being used as input for console Taiko (DDR pad, AC-sized drum) but none as weird as this. That lump of plastic with two levers is actually the controller you use to play a train-driving simulator called Densha de Go!, which originated on arcade and has console ports/sequels on PS1, Dreamcast, PS2, Nintendo 64, PSP, Nintendo DS and Wii, among many, many other different consoles and even on PC. Inevitably, the entire series is Japan-exclusive.
That's the controller you see in the video (though this is the Dreamcast controller all of them pretty much have the same few things anyway). The left lever controls don notes and the right lever for kat notes. Swing them back and forth for one input each. Not recommended for Oni....for obvious reasons!
Thanks to priestesspaula from chat for discovering this and uploading the video!
