Olga's unplugged version:
Edit: This live is pretty decent, though I still get quite artificial emotions. However, during the live stream today, she tried a little improvisation of the song in Czech and wow, I could probably warm up to that. They at least hinted at a possibility of her singing one chorus in Czech should she go -> yes please
Oh, and one more thing: Olga went through some of the reaction videos and she absolutely loved Matt's one, especially his sounds at the very beginning of her song