No prob, David.  First and foremost, be sure you are watching the video with Youtube annotations on.  Annotations of exactly what steps to take should appear many times during the video, in different locations on the screen.  If you watch the video at around :33 (thirty-three seconds), you should see an annotation appear at the lower right, which prompts you to change your Pivot Centers to "Individual Origins".  This is a separate step to using "Extrude Individual" tool, and does make a difference in how things will scale or rotate in the scene.  I can't tell, by the way you cropped your screen-capture, if you actually have the Pivot Centers set correctly at this point, but I do not believe you do, so you may have missed that step.

In the Blender UI, down on the panel where the icons for your transformation manipulators are, and where you can switch between vertex, edge, and face selections in edit mode, you will find an icon for "pivot center for rotation and scaling", and it has arrows right next to it, pointing up and down.  Press on that, and a fly-out with multiple Pivot Point options will appear.  You need to select "Individual Origins". from that list of choices.  Once you do that, you should be able to scale those faces exactly as I did in the video.

Let me know if you have trouble finding it, and how you make out afterwards.

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