This episode actually somewhat threw me off when I was watching it.
At first, I thought they would be talking about the homunculus (obviously) as in the "little man" inside your head telling you to do things as your thoughts/consciousness. But they instead related it to that obscure diagram of the porportions of our senses. So for example, the homunculus's hands would be very large because our hands are very sensitive, more so than the rest of our arms which would be comparatively smaller. Or how our lips and tongue would be very big on the head compared to how it really is like on our heads. I had already known about this concept, but I didn't realize it was called the homunculus. Or perhaps I had just forgotten.
So the video basically talks about the 5 senses, in a somewhat continuation from the last video being Sensation & Perception. This video would have done me good if I'd seen it during PSY280 Perception...
I had a laugh when I read through some of the comments at the bottom. Most of them were pleasantly surprised that Fullmetal Alchemist (the anime) was actually mentioned in the beginning. I was also one of those people..