I didn't expect that one.
Amir uses the word "fidelity" many times in his videos and reviews in statements of the sort "this is better in terms of fidelity", so I thought it would be nice to explain the meaning of a sentence like that in the context of audio, where it's not that clear what "original" means and also because what reaches your ears is not exactly what comes out of the speakers, not even the DAC, which by the way produces electricity, not sound, so it's a different type of fidelity... I don't really know, that's why I thought I would like to have that explained by Amir.