Oh dear, a bit of selective ripe cherry picking going on there. In response to some of your points...
1) What Nat actually said (without the spin)...
2:53 "Humans tend to rely FIRST AND FOREMOST on plant foods that they can find in the environment"
3:18 "Behaviourally people are plastic and some people eat meat but anatomically I'd say we're not adapted to eating meat AT ALL, our teeth are too big, the enamels too thin, the cusp on our teeth are too short, so we simply don't have the adaptations that you would need to chew meat efficiently. Anyone can look at the teeth of their dog or cat and they can see what teeth should like if you're going to eat meat and our teeth don't match, so you can say that we've evolved a face and a mouth that's for eating something else that's NOT MEAT..."
2) Wait...wasn't dentition one of the things you were using to support your argument earlier? (Canines tho...not heard that one before
).
3) We can't digest cellulose? And...? What does that prove? It's a similar red herring to the rumens comment you made earlier. Both irrelevant imo.
Now it could be that you have a different understanding and use of the terms omnivore and herbivore so I will clarify my understanding and use of those terms. I use them, as Nat was in his video, in the anatomical sense rather than the behavioural. A herbivore eats mainly plant material which is a more general use of the term, the common more restrictive use applies only to grazing animals which have special unique adaptations necessary to eat and properly digest grasses and leaves (and the cellulose you mentioned). An anatomical omnivore has adaptations which allow it to catch, kill and eat it's prey which humans do not have (without the use of tools and technology). Our anatomy and biochemistry (ABC) is closer to that of an herbivore than to an anatomical omnivore.
This is rather odd, because it was through Dr Mills referencing Nat that I found out about him, and Mic the Vegan included a clip of Nat talking in his video that I posted earlier. Perhaps you are projecting the fact that you yourself haven't watched them onto me. (or you missed those bits while skipping through). I know for sure that initially you ad-hom dismissed him before you watched anything because you couldn't have in the time I posted the original video. So where precisely is the contradiction?