Yeah, it seems the NN in this particular implementation just does edge sharpening (almost like a "dumb" algorithm), the interior of textures and faces etc. still seem to lack detail.
Right. And it makes some things worse. In the original the lady who runs across at about :27, you can make our her nose and mouth (barely). Her again in the upscaled version at :38 (it's hard to stop it at the exact same spot), she is virtually featureless.