The Theranos one is apparently made of up rehearsed footage, where each person in the scene is stage directed and agrees to give certain lines. The director gets multiple takes then mashes it together. It's what he's known for:
Lance Oppenheim (born January 26, 1996) is an American director and producer. His work blends nonfiction storytelling with heightened, cinematic formalism.
....so basically, it's a reality TV way to make a "documentary".