This is a very sophisticated way to explain what the continental drift is. It tells us that the continental drift is what has caused the continents to move into their current locations of when they are on planet earth. It also talks about Pangaea.
This explains the movement and the separation of Pangaea and what made the continents that we have today. It also talks about the future of what the continental drift will create in the long term future.
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle. It also talks about the continental drift and other things that affect the plate tectonics.
This video explains what is moving the tectonic plates, why they move and it explains what happens when tectonic plates DO move. It explains how we measure the movement and when we first believed in this theory.