It was an interesting video clip to watch, I like those kinds of studies.
Especially from this resent experience.
Few weeks before I watched the clip, person who was sitting beside me in the train told me that your music is too loud. Since then, I slowly stopped listening to the music when I go somewhere. Then I have noticed that I might not have been hearing well. It also reminded me the people in Fahrenheit451, they had their ear phones loud too!
I think I would give it a break before I go mindless, and for my ear`s sake...