Which air traffic holds the command "Runway [comp direction] L / R cleared for takeoff"?

Which of them is it? The ATC or the Movement Control Center? I wanted to know because in this youTube video "KWI United Airlines Inaugural Flights", I heard the ATC and the pilot saying like: Kuwait Tower: "...one-zero-zero-fifteen knots, after departure maintain runway heading..." /// Pilot: "and maintain runway heading, runway one-five right, cleared for takeoff, United niner-eight-one heavy...".