Yeah, I think in general they hit the nail on the head when it comes to these Encarta videos. A brief introduction, then some historical background, then on to gameplay effects and strategy. It's a good indication of how much care and effort has been put into the game.
One thing of particular note with this video, is that it gives a decent look at the religion system. If you look at the part between about 4:27 and 4:50, there's a lot of detail there, like those "religious verses", which you get to select as you advance your religion. It seems religion is quite powerful in Ara. Notice that these are not feeble bonuses, especially if you compare it to something like "+1 amenity in cities with two specialty districts" from Civ 6. Here you get things like a straight up 10% strength boost to your forces, 25% off a bunch of technologies, and so on. Also notice that there are quite a number of them. In the video they have chosen 6 verses, but this is still Act 1...it may be possible to get more, I don't know what the limit is. Finally, there's a nice bit of flavour text under each verse. Little touches like these matter to me.