That video is amazing! I even learned about some new differences between certain holofoil cards, and I only see one holofoil version missing (EX FireRed LeafGreen reverse holofoils had both a holofoil artwork and holofoil set symbol in the description).
Really loves his attention to detail, and you can clearly see that the preparation for that video and video itself must have taken a long time and a lot of effort. I can definitely relate, since I collect one of each rarity for Yu-Gi-Oh, and made this article about it. 
Greetz,
Quuador