Updated incorrect curriculum videos
Updated incorrect curriculum videos

The changes were to the video and slides for "Ethics: Principles-based approach" and to the video for "Application Programming Interfaces".
compsocialscience/summer-institute,compsocialscience/summer-institute,compsocialscience/summer-institute,compsocialscience/summer-institute,compsocialscience/summer-institute,compsocialscience/summer-institute