Complex sentence: Several of Two Tribes' developers, on hearing of this, staked out in a barbershop across the street, and used footage of Jake_R climbing a pole to find these clues as part of a clue in the second phase.
Split into simpler sentences: Several of Two Tribes' developers, upon learning of his presence, began filming him from a barbershop across the street. They would later use this footage of him climbing a pole to find these clues as part of another clue during the second phase.