Kind of in the middle? If he were to show up here, I think most people would figure it out, as he reestablished himself in his realm. [and it would be awkward, because Hypnos doesn't know him and it's technically his realm but that's a minor detail Baku will concern himself with if Morpheus ever shows up]

Some of the cool ones, some of the obscure ones . . . humans tend to be obsessed with it from a historical perspective. Youtube is full of things like that.

[Baku gets a lot of his knowledge nowadays from Youtube]

I've learned some things? But I've lived as one for the last 500 years, and I've been around since they were created in China. Movies tend to exaggerate a lot of human behavior, though.