I'd call the video good, but not great. It would be great if he provided links to some sources that explain the concepts he omitted to explain in the video.
If I recall correctly he never explains why you need three aligned control points to achieve G3 curvature continuity.
He also does not explain why G3 in Fusion 360 can only be achieved to flat surfaces.
When you loft between rails defined by sketches and the sketches have G1/G2/G3 constraints applied to define the transition between the sketch curves, that only guarantees that the transition of the resulting lofted surface is G1/G2/G3 in exactly the areas defined by the rails. It does not guarantee that transition across the entire surface. IN order to guarantee that we need to set the proper condition in the loft dialogue for the loft profile.
We only have up to G2, however. For straight surfaces, the rails provide all the definition needed, but for arbitrarily curved surfaces we'd need a G3 condition in the loft dialogue.
The documents I refer mostly to when users are interested in surfacing are the Autodesk Alias Theory Builders.
Written ages ago by the creators of the software, it's still some of the best documentation out in the wild!
Then I usually recommend the Handlebar 3D youtube channel. The guy works professonally in vehicle design and uses Alias for surfacing. A lot of the concepts he explains apply generally to surfacing but it also becomes clear where Fiosn 360 still has a lot of room to grow.
So the video only helps with the bottom part. While that is substantially more work than just creating circular fillets it's a necessary step in creating this seemingly simple object. The really tricky area is the top, however. I have yet to find a good approach that actually returns a good surface.
