LOL... maybe I'll make a game where you win if you actually manage to miss the target, using huge weapons :-)
Now, looking at the hierarchy: the "skeleton" game object has scale 100,100,100 but if I change it to 10, let alone 1, it becomes extremely small. All other parent objects have scale 1,1,1, except "weapon" and "Right Hand" (the equipment viewer) have scale 0.01, 0.01, 0.01.
The thing is... I haven't touched the scale on any objects, except the equipment viewer objects set to 0.01, 0.01, 0.01 per the tutorial.
I also noticed that if I just drop the brown pants and shortsword prefabs in the scene (and parent the latter to the equipment viewer), the sword's scale still changes to 100,100,100 but everything displays correctly: https://1drv.ms/u/s!AuImLoymvN9yrl8Ok70uYzMVmSJR?e=DuUi26
So, the problem seems to be related with play mode...
Yeap! here's the problem: In play mode, the scale of "weapon" changes from the edit mode value of 0.01, 0.01, 0.01 to 1,1,1! Even if I drop a new brown pants clone in the scene, while in play mode, the scale of "weapon" changes.
I'm not sure but I suspect that this might be related to the animation.