Visitas 2016 - Overcoming Big Obstacles to Keep the North Pole Promise by Professor S. Allen Counter

From a channel Lumen includes in full: Harvard's CS50 publishes David Malan's full introductory computer science course and its offshoots (Python, web, AI, games, business), complete lectures with sections and problem walkthroughs; among the most widely used free CS courses anywhere.

A 23-minute video from CS50's catalogue; the title names its topic.

Video by CS50, played through YouTube's embedded player.