Except nothing laid out in the vid contradicts what I've described. I
In-game, the archers start high-angle fire from around 150m, and certainly does not attempt to shoot from over 400. Certain crossbowmen begin shooting from a bit further out, like from right under 200, and some archers with longer range, like fians or forest bandits start shooting from slightly over 150. All of the shots the archers from that distance are high-angle fire and within effective range, but none of them are lethal. Not only is it extremely unlike to get hit by it, but also the damage is typically under 30, even if you do get hit.
The distances, in-game, where people complain "archers are too powerful" -- just as an experiment, press left ALT and check just how far they are out. Those shots come from within 100 range, typically between 40~60. That's when the casualties really ramp up, and that's well within direct-targeted, straight-shot range, that can penetrate armor.
The 'armors don't do anything" and "archers are too accurate" is the biggest myth in the game currently.