How did Ireland topple double World Champions Springboks in their backyard?

The Summer Tour was heavily dominated by the Southern Hemisphere teams, however, the main positive from the tour for the Northern Hemisphere sides was Ireland defeating the Springboks in the 2nd Test 25-24 with a last minute drop goal.
After a defeat in the 1st Test, Ireland created and executed a brilliant gameplan which was fundamental to their victory. This included beating South Africa at their own game and a new attacking tactic, focusing on the use of space around the breakdown with inside options.
Make sure to watch the full video and then comment below what you think was the biggest factor in Ireland's victory over South Africa earlier this year!