https://en.wikipedia.org/wiki/Schuko
The outlets are recessed, so you physically cannot touch any of the pins while they are engaged. For the same reason, ground is on the periphery of the plug and engages before the pins make contact. The Schuko plug and outlet are designed to prevent you from shocking yourself while still being a reasonable size and aesthetically pleasant. The safety shutters mentioned in the video are standard in Schuko outlets in some countries.
It's great that they thought about safety when standardizing the design, and interesting to see precisely which decisions were made and why. However, "Best On Earth" is a bit hyperbolic for a video that makes no mention of a more popular design that embodies all the same safety features (save for the in-plug fuse) in a more convenient form factor.