This is a very amusing, enjoyable and skilful electronic dance mix version of the Third Movement (Presto agitato) of Beethoven's 14th Sonata (the 'Moonlight').
I am particularly impressed by the continual inventiveness, the really danceable quality - and the exciting ending.
If you want a comparison with the original - there are many on YouTube, but they all seem too fast to me.
H/T - My son, for discovering this.
