Yes, this is the beginning of a piece performed digitally. I have no idea where this is from, but based on pieces we examined in my post-tonal aural skills class last semester, the exact tempo is probably so that two or more “instruments” play their lines at slightly different tempi, creating a dizzying effect of clashing lines that, like two mechanical clocks, sometimes coincide before once again spinning out of sync.
This, at least, is my guess.
Also, post-modern music is classical (ha) music composed after WWII that strives to break free from all previously established norms and expectations. I would not be surprised if, within the next one to two decades this current musical era is further broken. Starting at about the 80’s, post-modern music has split from creating new musical instruments or playing old ones in new ways to moving to digital music, where mathematics and music are combined to play that which human hands can’t. I wouldn’t exactly call it a digital age, but the increasingly consistent incorporation of the digital in avant garde post-modernist music makes constantly question the very definition of music. It has now been stretched to consisting only of pitches; sounds that are called music only because they were placed in a deliberate fashion. Of course, even that deliberateness has been called into question, starting all the way back to Charles Ives (Central Park in the Dark) and George Gershwin (American in Paris).