If it wasn't clear in the video, I apologize. But, at 2:51, I say, "Push 3 on your keyboard." Then I explain further. we are actually using Smooth Preview in order to model in a smoothed state. Pushing 2 on the keyboard smooths the mesh while still showing a cage, representing the un-smoothed geometry. Pushing 3 shows the smoothed mesh without the cage and pushing 1 returns the mesh to an un-smoothed state.
HOW DID YOU SMOOTH IT
If it wasn't clear in the video, I apologize. But, at 2:51, I say, "Push 3 on your keyboard." Then I explain further. we are actually using Smooth Preview in order to model in a smoothed state. Pushing 2 on the keyboard smooths the mesh while still showing a cage, representing the un-smoothed geometry. Pushing 3 shows the smoothed mesh without the cage and pushing 1 returns the mesh to an un-smoothed state.