This piece was written in 1904 by Italian composer Vittorio Monti. It is based on the Hungarian folk dance the czárdás, which starts slowly and gradually gets faster. In Monti’s Czárdás, the sections alternate between slow and accelerando, and major and minor keys. From 2:56 you can hear the violinist playing stopped harmonics, where you press down normally on the string, but also (with a different finger) 5 semitones above, creating a note 2 octaves higher with a ‘ghostly’ tone.
Hayes Music blog 