I can´t stand more than 20 min

I agree. I was even trying to keep up by the "section titles" such as "Nature" or "Metaphor". But nothing made sense.

The only real narrative seemed to be this woman's relationship with this man, whom I guessed to be the metaphor for "language", but listening carefully to the dialog, I could not make heads or tales of it.

I think it's just meant to be an hour-long visual poem. Frankly, I'd rather just read poetry!