Musique concrète is, among other things, a school of listening, and of phenomenology in concreto.
(The composition is "Concret PH"  by Iannis Xenakis. I guess the clever picture montage for the YouTube video was made by unholy1988 – not sure about that, though.)
Learning to listen to the music of the world is not completely different from recognizing the originarily poetic nature of real-life encounters: "Every real encounter is also a remembrance of the secret of the poem [jede wirkliche Begegnung [ist] auch Erinnerung an das Geheimnis des Gedichts]" (Paul Celan). The poem refers to the "real life" experience only since "real life" encounters themselves bear reference to "the secret of the poem".
The music is out there – just listen.