Complex sentence: They had met while filming Koh's directorial debut "Timeless Love" (2012), and "seeing the passion" in them, and having been in the entertainment industry for 20 years, he wanted to pass on his experience or connections he had.
Split into simpler sentences: They had met while filming Koh's directorial debut "Timeless Love" (2012) and "saw the passion" in them. Having been in the entertainment industry for 20 years, he wanted to pass on his experience or connections he had.