Could they just be using old footage? It's very unlike any car manufacturer to go back to an older design to release a new vehicle.
A "related article" on the page has the title "2020 Nissan Frontier: Same 16-Year-Old Truck, New V-6 Engine" - and it's the petrol version they're talking about, because they've replaced the 4.0L with a 3.8L plant (the V6 diesel was a 3.0L engine).
It's certainly odd, but hey, when you're on a good thing ... I am not sure why they went with the older D40 to compete with other makers in an off-road design though, because the D40's longer wheel base does reduce its centre clearance over obstacles (and they admit this in the article).