The binder clips help connect the three folded pieces of paper. Kudos to Nathan for complementing the textual description with visual representations of the folds. You can customise the tent as per your needs, such as substituting the white sheets of paper with coloured ones. Nathan suggests adding more binder clips to add more stability to the contraption.
He uses the light tent for shoots with indirect office lighting or reflected sunlight. It’s a wonderful hack that comes in handy when you’re away from your studio: “It takes me about a minute to make one from scratch.”