The poem you’re listening to is McCrae’s “In the Language,” originally published by Omniverse. Here’s a link. Scroll to the second poem.
I also mentioned The Essential Etheridge Knight (University of Pittsburgh Press, 1986). Here’s a sample poem from that book where Knight uses the forward slash (line break marker) within some of his lines. The interesting thing here too is that he uses the long dash, like Dickinson, as well. I’ll have to listen to McCrae read some of his poems on YouTube. Maybe I’ll hear what’s going on with the breaks.