Hello Wayne,
At 8:35 you say that "This is not something what you need to do." when adding the Cycles modifier to the curves. Actually the Cycles modifier is what fixes that pinch at the top. At least this is how it works in Blender 2.8.
Btw the curves are perfect in Blender 2.8 :) No need to manually fix them to make a circle. Just add the Cycles modifier and it's done.