Ok, I've watched this entire video and I can see there is a lot involved in this.
I do think that most of the videos on Youtube showing people taking photos and making it look easy are actually very misleading.
From what I can see, everything boils down to the quality of the photos. It's really that simple. Getting the correct lighting, correct depth of field, and focus on the focal points rather than getting pretty pictures. In other words, quality > quantity.
In his example he has almost three times as many points compared to a project that I am working on, and I have double the amount of photos.
Oh, and dont underestimate Adobe Lightroom. I ran all my photos through the steps in his video, and the difference it made was incredible.
I could go on and on, but the bottom line is that it's certainly possibly with a single camera. Just takes a lot of practice and patience.